I have used them for 14 years for pest control and the guy has always treated from the outside. I have a pest control system built into the walls. However in August of 2018 I was having a terrible problems with ants and the guy came out here four times to treat. No luck. One day he came in with a wand and a canister and started spraying everywhere. I noticed that it left a film on my cabinet which I thought I could wash off after I let it work for a couple of days. But now after looking at it I can see that it has eaten the stain off my maple cabinets and Hometeam is trying to deny that they did the damage.