I'm in SW AZ and the local propane cost has become very high. I've not used the furnace in my mobile home for decades due to this cost. Winters are warm enough to get by with space heaters.
Anyhow, the mobile home is old and the edges of the floor heater vent covers keep riding up and need fussing with to avoid tripping over them. The screw holes in the floor for the vents have long ago enlarged so they don't hold any more.
Suggestions for something to make the screws work again, maybe some sort of insert? Or something very thin I can easily put over the vents to cover them that will stay securely in place so I don't trip over them like I do the vents but can be removed some day if necessary? The troublesome vents are on floors with no rugs.
TIA