Still having problems with garden centipedes

[alligator1]

I live in Michigan and most of my orchids became infested with garden centipedes when I purchased some orchids kept in a greenhouse/outside from a fellow orchidist. Unknown to me when I repotted them the eggs were still there. So I grow under lights and they sit inpots on clay aggregate in trays and the centipedes could crawl to the uninfested plants. So my other orchids got infested. I used malathion once outside in the summer like I was instructed by an Orchid Judge. Well they are back. I see some people use 409 and equal parts rubbing alcohol to control bugs. Could this be used inside the house (as it is cold in Michigan now) as a drench to kill these things?