I would also talk to the vet. Dont use over the counter meds at all. What my mother done when she got her kitten (who was only 4 weeks old!! someone was giving them away already!!) Anyways, use dawn, dont use a concentrated dish soap. It will get most of them off. Then use a fine comb to get some more off. Make sure you keep them warm until dry, or use a hair dryer set on LOW heat, on the low setting, keeping it a long ways from the baby. They have sensitive skin.