What do you do when you enter a house and then realize its infested with fleas? Do you bomb your van? Also, what do you tell people that tell you over the phone that they have a flea problem? I always tell them to call an exterminator first to take care of the fleas..and then I can come and clean the carpet. But today I had an exterminator tell me that I should clean first and then have him come because once I clean I will remove the insecticide that he is used and so there will be nothing left to kill the fleas. This makes some sense to me..but it doesn't solve my problem of carrying fleas with me to my next client. Also, If I was to wait till after the fleas have been killed, how long would I need to wait after they had been treated?