If you are talking about in the incubator I am not sure...
but if this is after you take them out...
1 city dwellers have always relied on the watery grave. (THE TOILET)
it aint pretty but it works!
usually....
if you have a bit of property, even a decent flower garden or so.... get the shovel, dig a hole, drop the bad stuff in, and cover with the same dirt.
works every time.....
usually.