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Why the handover is part of the hire

The fun ends, the children go home sticky and tired, and suddenly there's a deflated castle on the lawn and a collection van due within a few hours. How you clean, dry and pack the inflatable before that van arrives has a real bearing on your deposit, on the state of the equipment for the next family, and on whether anyone ends up having an awkward conversation about mould. Most UK hire agreements include a clause about returning the unit in a broadly clean and dry condition, and some suppliers reserve the right to charge a cleaning or drying fee if it comes back wet or caked in mud. None of that is meant to be alarming. A little methodical work with things you already have in the kitchen cupboard and the shed is usually all it takes.

Start with the supplier's own instructions

Every inflatable is built slightly differently, and hire companies know their own stock better than any generic advice online — including this guide. Check the paperwork, the email confirmation or the label on the storage bag before you do anything. There will usually be notes on which cleaning products are safe, how the unit should be folded, and whether the blower or its cable needs any particular treatment.

• Use only mild washing-up liquid diluted in warm water unless told otherwise.
• Avoid bleach, solvent-based cleaners, cream abrasives and anything heavily perfumed.
• Never use a pressure washer — it forces water into seams, stitching and the blower attachment.
• Don't scrub printed panels or artwork with a stiff brush; a soft cloth or sponge is plenty.

If anything in the instructions is unclear, ring or message the supplier. It's a two-minute call and it protects both your deposit and their equipment.

Wiping down the surfaces properly

Switch the blower off at the plug and let the castle deflate fully before you start cleaning. Working on a floppy, half-inflated unit on a windy day is how people trip over guy ropes and how panels get dragged across gravel.

Brush off loose debris first — grass clippings, crumbs, sand, glitter from party bags — with a soft hand brush or a broom. Then mix a small amount of mild washing-up liquid into a bucket of warm water, dip a microfibre cloth or soft sponge, wring it out so it's damp rather than dripping, and wipe down the whole surface in sections: the slide, the walls, the step, the top of the turrets, then the underside and the anchor points.

Pay attention to the usual suspects:

• Fizzy drink and juice spills, which attract wasps if left.
• Ice cream, cake icing and chocolate, which smear rather than wipe.
• Mud along the bottom skirt and around the ground pegs.
• Sun cream marks on the handrails, which are greasy and need a second pass.

Wipe again with a clean cloth dampened with plain water to remove soap residue, which otherwise dries tacky and collects dust in storage.

Drying it out completely

This is the step people rush, and it's the one that causes most problems. Pack an inflatable away while it's even slightly damp and it will sit in a sealed bag for days or weeks, which is exactly how musty smells, black mould spots and weakened stitching develop. Mould damage is often not covered by hire agreements and it is difficult and expensive to put right.

Once wiped, lay the deflated unit out flat in the sun or a light breeze, on a clean, dry surface — a patio, a driveway or a tarpaulin, never on damp grass. Leave it for at least an hour, and longer in cool, humid or overcast conditions. Turn it over halfway so the underside dries too. If you're short of time, run a clean, dry towel over the fabric, then towel it again. If the castle was out in the rain, briefly re-inflate it with the blower for ten to fifteen minutes, switch off, and let the airflow do the work before deflating again. Test the seams and corners by touch rather than by eye; cool, shaded fabric can look dry and still feel cold and clammy.

Folding, packing and accounting for every part

Follow the supplier's folding method if they have given you one. If not, fold loosely along the existing creases rather than forcing new sharp ones, and roll the larger sections where you can. Tight folds along the same lines every time eventually crack the coating. Never kneel or stand on the fabric while packing, and keep keys, jewellery and shoes away from it.

Slide the folded unit into the storage bag provided, then gather up everything that came with the hire and count it:

• Ground pegs or stakes
• Sandbags and any tie-down straps
• The blower, its cable and any extension lead
• Ramps, mats, safety pads and repair patches
• Storage bag, sack trolley and any spare parts

Store it indoors in a dry shed or garage, off the concrete floor if possible, away from anything heavy and anything that might nibble it. Never leave a packed castle outside overnight waiting for collection.

Reporting damage before the van arrives

Be honest and be early. Walk the unit before you pack it and look for tears, split seams, popped baffles inside, stains that won't budge, broken zips, a damaged blower cable or missing pegs. Photograph anything you find, then ring or email the supplier straight away rather than waiting for the driver to discover it on your driveway.

Don't attempt repairs with duct tape or a home stitching kit. Tape leaves adhesive residue that has to be cleaned off, and a DIY patch will usually fail and can make the original damage worse. A quick call explaining a small tear is nearly always met with a shrug and a repair kit. Discovering it later, after the castle has left your house, is when deposits get held and invoices get raised. Mention it on arrival, hand over all the parts, and you'll have done everything the agreement asks of you.