In short: after winter storage, start by ventilating your campervan, opening cupboards and checking for moisture. Then work through the fridge, kitchen, fabrics, mattresses, toilet, drains, water system and basic pre-trip checks. A stale odour after storage may be normal, but mustiness, water marks and damp areas require investigation. Add a subtle fragrance only after cleaning, drying and ventilating.
Opening a campervan for the first time after winter can reveal a great deal about how it has coped with storage. Sometimes there is only a stale, closed-up smell. Other times, you immediately notice mustiness, damp fabrics or odours from the fridge or bathroom. It is worth approaching this calmly and methodically.
This guide concerns the interior, comfort, odours and hygiene. It does not replace professional servicing, manufacturer instructions or inspections of gas, electrical or braking systems. For safety-critical systems, use a service centre or suitably qualified professional.
Table of Contents
Where Should You Start After Winter Storage?
After winter storage, start with air and light. Open the doors, windows, roof vents, cupboards, storage compartments and fridge. Do not judge the odour in the first ten seconds. An interior closed up for several months can smell heavy even when there is no serious problem.
Your first round of checks should look like this:
- Open up the interior and ventilate it for a while.
- Take out fabrics: bedding, towels, mats, covers and curtains, if they were stored inside.
- Check underneath the mattresses and the areas near the walls.
- Open the fridge, kitchen cupboards and storage compartments.
- Check the bathroom, toilet, drains and tanks.
- Look for signs of moisture around windows, doors, roof vents and seals.
- Only afterwards should you clean, dry, organise and freshen the interior.
The Camping and Caravanning Club recommends a check before the season’s first trip, even if the vehicle was well prepared for winter. This does not replace professional servicing, but it helps identify obvious issues before you set off.
Odours After Winter: Normal or a Warning Sign?
A stale, closed-up interior smell after storage is fairly normal. It often disappears after ventilation, cleaning and taking fabrics out. Mustiness is different. If the smell is damp, cellar-like or returns in the same place, treat it as a sign that further checks are needed.
A normal post-storage odour:
- is general rather than coming from one specific point;
- becomes weaker after opening windows and cupboards;
- does not return after cleaning;
- is not accompanied by damp areas, water marks or visible growth.
A warning odour:
- smells musty;
- returns around a mattress, cupboard, bathroom or window;
- is associated with damp fabrics;
- is accompanied by water marks or wet surfaces;
- does not disappear after ventilation.
If you suspect mustiness, follow the separate checklist on moisture in a campervan.
Table: Interior Area, What to Check and What to Do
| Area | What to check | What to do | When to investigate further |
|---|---|---|---|
| Mattresses | underside, corners, odour and dampness near walls | lift, ventilate, dry and check the base beneath | when moisture returns after every night or storage period |
| Fabrics | bedding, towels, mats and curtains | take them out, air them, wash or dry them thoroughly | when they still smell musty after ventilation |
| Fridge | odour, seals, drain and moisture | clean, dry and leave the door ajar | when the odour returns despite cleaning |
| Cupboards | stale air, fabrics and signs of moisture | open them, remove items, wipe and dry | when dampness is localised or appears near a wall |
| Toilet | cassette, seals, tank and odour | empty, clean and prepare it according to the instructions | when the odour returns after cleaning |
| Water and drains | leaks, drain odours and water flow | start the system according to the instructions and check for leaks | when a leak, odour or uneven flow appears |
Fridge, Kitchen and Cupboards
The fridge is one of the first places worth checking after winter. Even if it was emptied, moisture, a stale odour or signs of incomplete drying may remain.
Work through these steps:
- open the fridge and remove the shelves;
- clean the interior with a mild cleaner suitable for the surface;
- check the seals and drain;
- dry the interior thoroughly;
- leave the door ajar to ventilate fully;
- check cupboards containing food, spices and containers.
In the kitchen, also check the areas around the sink, worktop, drain and bin. An odour after winter often does not come from the whole campervan, but from one closed compartment.
Mattresses, Fabrics and Damp Areas
Fabrics quickly absorb the smell of a closed-up interior. After winter, it is worth taking them out, airing them and checking them separately. Pay particular attention to items stored in cupboards or placed close to walls.
Check:
- bedding and blankets;
- the underside of mattresses;
- mats and carpets;
- curtains, blinds and covers;
- under-bed storage compartments;
- areas around windows and doors.
If fabrics smell musty, do not cover the smell with fragrance. Dry them, wash them or take them out of the campervan first. Only when the interior is dry should you consider fragrance for comfort.
Toilet and Bathroom
The toilet needs a separate check after storage. Inspect the cassette, flush-water tank, seals, bowl and the area around the closure. Thetford notes that regular cleaning, periodic tank maintenance and seal care help keep the toilet in good condition and reduce odours.
After winter:
- check that the cassette is empty and clean;
- inspect the seals and valve;
- clean the bowl with a product suitable for portable toilets;
- check the bathroom odour after ventilation;
- do not use harsh household cleaners without checking the instructions;
- prepare toilet chemicals according to the label before first use.
Find more detail in our guide to a portable toilet in a campervan.
Water, Drains and First Start-Up
The water system needs a calm, methodical start-up after a long period parked up. The Camping and Caravanning Club recommends combining a post-winter water-system check with a disinfection procedure carried out in accordance with the instructions for both the vehicle and product used.
A general procedure:
- Close taps and drain valves according to the vehicle instructions.
- Fill the fresh-water tank.
- If you use a disinfection product, follow the instructions on its label.
- Turn on the pump and bleed the taps one at a time.
- Check whether water flows in a steady stream.
- Inspect for leaks around taps, beneath the sink, near the boiler and at drains.
- Flush the system according to the instructions for the product and vehicle.
If a drain odour appears, return to the source: the sink, trap, grey-water system, bathroom or residue left after winter storage.
Basic Checks Before Your First Trip
Freshening the interior is one thing, but you also need to check safety before setting off. RAC and the Camping and Caravanning Club highlight tyres, lights, systems, water, gas, documents and alarms, among other essentials.
Before your trip, check at least:
- tyres: pressure, cracks, wear and condition after a long period parked up;
- external lights and indicators;
- the battery and basic 12 V systems;
- smoke and carbon-monoxide alarms;
- the fire extinguisher and first-aid kit;
- documents, insurance and breakdown cover;
- 230 V cables, plugs and the RCD, if you use an electric hook-up;
- gas equipment in accordance with the instructions and safety rules.
Do not improvise with gas, 230 V systems, brakes, leaks or safety systems. If anything raises concerns, servicing is a better option than starting the season with unnecessary risk.
When Should You Use a Diffuser or Fragrance?
A fragrance, diffuser or fragrance oil only makes sense once the interior is clean, dry and ventilated. It is the final step—not a diagnostic tool.
Do not use fragrance to mask:
- mustiness;
- damp fabrics;
- toilet odours;
- drain odours;
- a fridge odour after storage;
- signs of moisture around windows or mattresses.
The best order after winter is: ventilate, inspect, clean, dry, check for odours again and only then gently freshen the interior.
After winter, fragrance makes sense only when the campervan has been aired out, fabrics are dry, the fridge has been cleaned, and the bathroom and drains have been checked. If you would like to choose a light option for a car, home or campervan, see our guide to an air freshener for campervans, cars and homes. Treat KAMPERup! diffusers as the final stage of cleaning, not as a way to conceal mustiness.
What Is Worth Keeping on Hand?
A simple kit is useful for freshening up your campervan after winter, helping you work in stages: clean, dry, check for moisture and only then improve comfort.
A practical kit may include:
- a hygrometer;
- gloves for cleaning and toilet care;
- quick-drying cloths;
- a mild surface cleaner;
- a laundry bag for fabrics;
- a container for damp items;
- a portable-toilet treatment compatible with the instructions;
- a subtle fragrance used after cleaning and ventilation.
If you are putting together equipment for the start of the season, browse the Campervan Comfort, Fragrance and Hygiene category. Choose items for specific tasks: moisture, toilet care, the fridge, fabrics, cleaning and comfort after freshening the interior.