Guinea pigs only need to be bathed once a month in the summer, and every two months in the winter. This is unless your pet needs of an anti-parasite bath, or if you've been told by a vet to bathe them more frequently. In general, too much bathing puts the animals at risk of skin infections and chills.
Is it OK to bathe a guinea pig?
Like cats, guinea pigs are clean-freaks and groom themselves all the time. This means they don't need to be bathed too often. In fact, giving them a bath too regularly will do more harm than good, removing natural oils and causing dry hair and itchy skin.
How do you dry a guinea pig after a bath?
Gently towel dry your guinea pig by carefully rubbing and soaking up the excess water with your towel. Place in a small box on a dry towel, to shake and recover! You can use a hair-dryer at this point although it would be better if he could dry off naturally.