I don't totally understand what you are saying, can you clarify? I only washed them because one exploded and they became full of egg junk. If you remove a rotten egg before it explodes, the bacteria shouldn't be out and about the incubator anymore than it would be else where, bacteria is everywhere, in the air we breathe so I don't see the point of all this work if you remove the egg in time. And I have experimented with the whole washing eggs thing. With my personal experience, I found that I get better hatches when I do wash them from the begining. In fact, of the shipped eggs I reiceived (unwashed) I decided that 2 of them were bad enough to need to be washed even though I hadn't planned on it. And of course one of them is one of the only 2 that hasn't been invaded with bacteria. To wash you should use water warmer than the egg and gently wipe it down, don't submerge it for any longer than 30 seconds and don't srub to hard, just enough to get all of the crap off and for it to look clean. I know this is a debated issue, but that is just my personal experience. Some poeple even use Clorox wipes for the eggs to disinfect the eggs and incubator.