Although I've never used it. I usually rinse stuff thouroughly in hot tap water to "kill" anything that might be on their. If you need to scrub anything I use paper towels or an algae scrubber.
Another thing you could do is buy an extra set of nets, where each tank has it's own net. They are pretty cheap.
Funny you should mention that. I was searching something on google a few days ago (can't remember what now) and came across an old post on another forum about doing that - the reason it caught my attention was that the poster was "wetmanNY" (skepticalaquarist.com) who used to post here all the time but hasn't in a long while.