+Plumbing Colleyville TX😍💪 How to Use Baby Shampoo to [Clean] [Sink] Drains 1 Purchase baby shampoo if you don't have any. 2 Before cleaning the sink, put on disposable gloves. 3 Slightly dampen a piece of paper towel with water. 4 Squeeze a little of the baby shampoo onto the towel. 5 Vigorously rub the sink drain, using the towel with the baby shampoo. 6 Repeat the steps if necessary.