Contrary to popular advice, you can bath hamsters. I used to bath my male RC hamster once every two weeks because he got some kind of smell. I think it's a male hormone thing, but my current female hamster has never had a bath before except when she had diarrhea a couple of months back and got poo all over herself.
Honestly, I don't advice bathing a hamster unless it's VERY tame and used to being handled.
Steps on how to bath a hamster:
1. Prepare shampoo for small animals (I use Hagen brand, pink color shampoo made in Canada), towel and a small "kong" of very warm water. It's best if you dilute the shampoo, 1 part shampoo to 6 parts water.
2. Slowly lower the hamster into the kong of water up to its front legs. Pour a little diluted shampoo on the hamster and gently lather up.
3. Gently pour water on the hamster's back (avoiding face, nose and ears) until the shampoo is all rinsed away.
4. Towel dry immediately. My RC hamster was very tame and allowed me to blow dry him. If you choose to blow dry your hamster, used the hot setting to blow off access water and then switch to the cooler setting. Never face the nozzle of the hair dryer to close to the hamster.
I can sense that inexperience hammy handler will drown this hammy in that "kong"
better not trying if you can't handle your hammy properly.. putting the hamy into the "kong" sounds so dangerous, what if the hammy shake and u suddenly let go