It takes about three days for the oils and proteins to come back. Then use a conditioner on top of that. Also, stay away from shampoos with lauryl sulfates. Let conditioner soak into hair - Before combing out tangles, apply conditioner and let it set for about 20 seconds. Don't comb hair first and then put conditioner in.
Oily hair hates surfactants - Stay away from shampoos for oily hair.
The surfactants in these shampoos tend to be more harsh, so they'll strip the oil from the scalp and hair. But the glands in the scalp will produce more oil as a result. Brushing hair also helps to distribute natural oils through the hair, which will make it healthier. Never hold a blow dryer in one spot - The blow dryer should always be moving slightly. Leaving the blow dryer in one spot will take all the moisture out of that one spot very quickly.