I get that every time with my hairpiece.

I think the best thing to do is keep a can of the spray paint that you can use to color hair for halloween. (seriously).

When I get a bit of a bald spot, I can just spray at that location so it fills it in and hides the shedding area.

That method works well and can get about another month out of my hairpiece!

I believe there are other types of products on the market too they recommend. But I like the cheap can of spray paint for the hair.