Not a nurse, but my wife is. It's amazing how much of the instruction early-on about dealing with this had nurses and parents everywhere saying, "Shouldn't you always wash your hands, particularly when out in public touching stuff that's been touched by others, and before touching your face". Maybe we've been a bit more germ cautious, but my grandma (who was not medical) gave the same practical advice.
Our son got covid in late Nov and neither my wife or I got it. I set up a laptop, monitor and accessories for an engineer I work with and took it to his house. I placed it on the porch and he and his wife talked with me for 20 minutes (both with active/fresh cases), from 15-20' away. He used this equipment and delivered back to my office in the same box exactly 2 weeks later (when I'm sure he would still show positive). I left it there for 2 days, then parted it out, put the laptop back in my desk, sanitized my hands and went about my biz. A couple days later I took it out and lightly sanitized the keyboard, then placed it back in my desk.
I'm not a med pro of any sort, but dry is a good weapon. If I had to go live/sleep in an apartment where any viral contamination had been, and I had days to make the decision, I would crank the heat to 85-90 for 2 days before moving in. I completely agree with the bleach thing as well, and would wipe counters. Maybe Lysol the place but not go hard-core.
We had a guy come in and "sanitize" the factory after hours a few weeks ago. Only two of us were working that night and he brought some well-dressed teenagers, and a news crew cameraman. They spent 45mins planning how the guy would get his camera shots, put on some backpack sprayers and N95 masks (not respirators) and spent another 45mins on the shop floor creating a bit of a smell and making himself a commercial. Must have been someone's brother-in-law. The place is probably 120' by 1000' and I can virtually guarantee that nothing was thoroughly sanitized. Sorry for the rant, but a lot of folks are making a ton of money spraying this and that and playing on fear when good sound information (as given by 2 medical professionals above) exists.
I remember my wife going to work in MICU as a new nurse in 1988. That's when there was still a lot of myth and fear around a virus. It was HIV. She told me one day, "A 10% bleach solution will kill AIDS". Back then HIV and AIDS were interchangeable in common conversation. I never forgot that, but hadn't thought about the parallels of last year until now. No one outside the gay community and those needing blood had much to worry about then. But it must have been rough on those folks being in a cloud of misinformation and fear.
I hope your brother-in-law is doing well. As for the equipment, I'd put it in sunlight for a few days, and in dry storage until I needed it. In two weeks I'd lick it if I felt so inclined. Once it is sprayed, I wouldn't try and keep bees in it. His friend needs to calm down. And if the doc tells you there's no risk in your home by now, then there's probably no risk.