Cloody the Bunny Rabbit totally looks like a human while getting a sink bath.
Normally rabbits clean themselves just fine, unless they get especially dirty.
Shampooing Your Rabbit - Pick up your rabbit gently, and place it in the bath. It will probably be a bit shocked when its feet hit the water, so hold it gently at the back of its neck, so it's not able to move around too much. Now, pick up the shower head and wet your rabbit all over his/her body making sure not to get water in your rabbit's eyes.
This freaks them out and makes bath time almost impossible. Now, using pet shampoo (gentler on your rabbit's skin), rub it all over its body taking care in particular to wash its paws and its bottom. Once everything is shampooed well, you're ready for the next step.
Rinsing Your Rabbit - Rinse off your rabbit using the shower head, making sure not to get water in your rabbit's eyes. Be especially careful to rinse all the soap off your rabbits paws, stomach and bottom as, what you don't remove, your rabbit will lick off himself and that could cause him/her to get a stomach ache.
Washing Your Rabbit's Head - Still holding your rabbit gently behind his/her head, get a damp wash cloth and sponge around his/her face taking special care around his eyes, nose, mouth and ears. Once your rabbit has been sponged off he/she is ready to be lifted out of the tub. (Source)