I have my layout in my garage and in an attempt to eradicate excess bugs I used bug bombs. Well the results were great for removing the insects but wow did it ever leave a residue on the rails. This stuff had to be scraped off. I didn’t think there would be this kind of residue as the bombs used said you could use them in doors. Maybe I bought the cheapies.
My layouts in the basement and I decided not to go with bug bombs because I heard of the residue situation at a local hooby shop. I use two products good for 3 to 6 months. 1 is bug stop spray safe once dry but dont stay in the room after you sprayed it, this stuff is bad to breath in. Second is Spider kill or something on that line. Infested with daddy long legs I decided enough is enough a clean one web another appears so its in a spray can like most bug sprays and I sprayed under the layout on the walls (no rails next to the walls) on the floor and so far no spiders for 4 months. Its suppose to kill the eggs of spiders and any spider that comes in contact with it. So far it works.
I’ve used bug bombs before and the one thing it said to do was to fill your sink with water and place all your silverware under water so it would not tarnish.
Depending on the brand you used some need to be placed on large sections of paper so they do not destroy carpet/upohlstry and the like.
I’ve used them and the residue hasn’t been much of a problem. The only thing I cover is the layout and all my hobby stuff. I use the cheapies but my garage is unfinished. I spray the perimeter with a border defence concentrate. I do under my benchwork too. I hang up fly strips too. I’ve got a lot of bugs on my property.
They make a dry type fogger. (or they did) I think Raid makes them but they are not cheap.
I have used the Raid ones with no problems. They work very well, and I had no issues with residue on my nearby layout.
The key to their success, apart from not going cheap (the Raid ones are made in Canada and shipped to you folks because they are illegal here…go figure), is to make sure the smoke can access all areas where spiders may be. That means displacing cieling tiles here and there, opening cupboards and every drawer, and closet doors. Wouldn’t hurt to displace furniture that is tight against walls, and tilt sofas and chairs so that any skirting doesn’t block air movement.
Like any treatment, you should repeat in 10 days to take care of the little 'uns that hatch, or to get the repeat offenders.
There is a plastic cup with a foil cover…remove the foil and put in water to the fill line in the cup…drop in the canister and it will start emitting smoke shortly. I’ve used these several times and they work great!!! With the spray type ones you have nasty residue but with the Fumigator it is just a smoke.