

How to block off washer/dryer gap from cats?
Our cats like to hide behind the washer/dryer, just under the duct. We added a door to the laundry room, but they dash in and hide there when we go in and out, and need to be blocked off completely.
What would be reasonable to use to block it off without creating a fire risk? A little bit of some kind of mesh?
EDIT: Thanks for the advice, but I'm not looking for an alternative solution. I know my cats, and blocking off access is the best way to make them forget about a convenient hiding spot. My question is whether something like an air vent screen cover could be adapted in a DIY way to improve this area as a house with cats, or if that would be a fire hazard/not enough ventilation.