How do I clean up mouse or rat droppings safely?

The risk here is entirely about dust. Dry droppings and dried urine break up into fine particles when disturbed, and that is what carries the hazard into the air. Wetting everything first removes almost all of it, which is why the sequence matters more than the product.

Safety

What you'll need

• Disposable gloves
• FFP3 mask
• Household disinfectant or a bleach solution in a spray bottle
• Disposable paper towels
• Refuse sacks
• Eye protection, for overhead work in a loft (optional)

Step by step

1. Ventilate the space first.Open windows and doors and leave the room for half an hour before starting. For a loft or a closed cupboard, open it up and give it longer.
2. Put on gloves and a proper mask.Disposable nitrile gloves and an FFP3 mask. A cloth face covering or a basic dust mask does not filter fine particles. Add eye protection if you will be working above head height.
3. Spray, do not sweep.Wet the droppings, the surrounding surface and any nesting material thoroughly with disinfectant and leave it for at least five minutes. Damp material does not become airborne, which is the entire point of the method.
4. Wipe up with disposable towels.Pick everything up with paper towel and put it straight into a bag. Do not use a cloth you intend to reuse, and do not shake anything out.
5. Disinfect the whole area afterwards.Wipe the surface again with fresh disinfectant and let it stay wet for the contact time on the label. Then clean normally. In a kitchen, treat every surface a mouse could have crossed, including inside drawers.
6. Double-bag the waste.Bag it, tie it, put that bag inside another and tie it too. It goes in the general waste bin, not recycling and not compost.
7. Throw away contaminated food.Anything in cardboard, paper or thin plastic that has been gnawed or has droppings on or near it. Rigid sealed containers can be washed. Do not try to salvage flour, cereal or rice from a gnawed packet.
8. Wash textiles hot.Tea towels, cloths, oven gloves and anything from an affected drawer at 60 degrees if the label allows. Items that cannot be washed hot can be bagged and left, or dry cleaned.
9. Handle loft insulation carefully.Heavily fouled loft insulation is usually replaced rather than cleaned. Dampen it, bag it in situ, and check what your council requires for disposal. Mask and full covering for this one.
10. Deal with dead rodents at arm's length.Gloves and a bag turned inside out over your hand, or a shovel. Double bag, and disinfect the spot afterwards. Never handle one with bare hands.
11. Wash yourself properly.Remove gloves without touching the outside, bin them, and wash hands and forearms with soap and hot water. Wash your clothes afterwards if the job was substantial.

Tips

• Do this after the infestation is controlled, not during. Cleaning a still-active area is work you will simply repeat.
• A garden sprayer makes wetting a large loft area far easier than a trigger bottle, and keeps you further away from the dust.
• If there is a very large accumulation, in a loft or a property that has been empty, that is a job for a professional cleaning service with the right equipment.

Common mistakes

• Vacuuming droppings up — A domestic vacuum without a sealed HEPA system blows fine particles straight back into the room, spreading the exact material you are trying to contain. Even with a good filter, the disturbance at the nozzle creates dust.
• Sweeping a loft or a cupboard out with a brush — It aerosolises dried urine and droppings in an enclosed space with no ventilation, which is the worst combination. Wet first, always.

If it doesn't work

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