Humping causing hard substance

Question
I know that humping casuing semen on the guiea pig's fur is normal. HOwever, i
have three guinea pigs(all male) and when one leaves semen on the other, the
third(youngest) one will bite and pull off my piggie's fur! he is having bald
patches on his butt now and the worst thing is, now, he has semen stuck on his
skin. what can i do? is there anything that can help remove it?

Answer
You could give your guinea pig a bath using small animal shampoo.  Don't use any dog shampoo, or cat shampoo, make sure it is specifically made for small animals such as rabbits and guinea pigs.  Also, when you give your guinea pig a bath, don't just fill a tub up with water and put him in there, make sure you just hold him and rinse him off after wetting his body and applying the shampoo.  That should work to get the semen off.  One more thing, make sure the water is just luke warm, you don't want to burn your piggie!!

Let me know how the bath went and if it worked, I personally think it is your best option.