When the comb is wet, friction is less and so sufficient charge can't develop.
When a plastic comb is rubbed with dry hair, it acquires some charges due to which it attracts tiny pieces of paper. But when a plastic comb is rubbed with wet or oiled hair the same does not happen. Why?
If you rub a metal comb in your hair it does not get charged why
Why does a plastic comb rubbed with dry hair attract bits of paper?
Why does a plastic comb rubbed with dry hair attract tiny pieces of paper?