Actually, Millimi is correct, Rabbits shouldn't be bathed. I did some research on this after someone asked me if all breeds shouldn't be bathed or just the rex breeds (standard and mini).
Since rabbits are susceptible to pneumonia and Pasturella, they can easily get sick after having a bath. In the wild, they rarely ever go into the water, unless it is a necessity.
If you do bathe your rabbits, you might want to consider stopping, or at least making sure that you take extra care about getting water near their faces, and drying them off immediately afterwards.
Most of the time, however, rabbits are pretty good at keeping themselves clean.