It sounds as if he has an issue with everyone..... Do the mask mandatory to enter home, shoes off, right to the sink to wash and sanitize hands. My husband now has cancer and I make people do that. It sounds as though he pushes your buttons, so I would push back. EVERYTHING he touches, as soon as he puts it down, pick it up and use a sanitizing wipe on it. Make sure your partner is on board with you. I would question what he says and try to find fault or prove him wrong. It will work if you have the strength to do it. I did this with a family member. He talks down to everyone. An addict who has been enabled his whole life. He was saying something about a big job his "business" was doing, but spoke down to us because we don't understand business. He has Quickbooks, this makes him a big bad business owner... he finally said well if you want the truth, I'm making $24,000 on the job, I was supposed to be blown away and very impressed. I laughed and said that's f-ing chump change and just kept going, cut him off when he spoke, put him down and spoke over him, used words he does not understand. He asked me what we got for our house, none of his business, but he said what did you "net"? That means after everything is paid. So I said, well this is what we paid for the house, 5% mtg. amortize it over ten years and do the subtraction, now times that # by 4 and that's what we "netted" He no longer comes by......sorry so long winded!