You have got a rough job ahead of you. Those little devils are hard to get rid of and will keep coming back like there is no tomorrow unless you continue to keep them at bay after you have them cleaned up and out this time.Some people think that when the weather gets cold they don't have to put the  collars, or that other preventive measures can be discontinued,this is wrong, wrong,wrong. They will strive all year long unless you keep on keeping on with the preventions.I tried something years ago and it worked for me.Sprinkle salt on carpets and floors .I swear that the salt dissolved them. That was a million years ago, so I might have forgotten how it really worked at the time.Make sure the yard, pets and house is treated at the same time.Good luck.