What bedding are you using, how long has it had to air out, and what diameter are your water bowls?
I'm using Aspen, very thin layer and I let them all air out this morning for like an hour and I even dried the inside of the tubs with a towel to make sure.
The smaller ones have a 5" diameter water bowl and the 700g Bee has a 6". The 5" was the smallest.