The shedding is really all over just the right side was lower in density to begin with, the back/top is starting to get bare as well. I have been using the Loreal everpure shampoo. As soon as I submitted the question on knot sealer my mailman came and so did my new piece. I ordered more density for this one but unfortunately it looks thinner in density than my current one. I am scheduled for my bi weekly appointment this Friday so will see what Didi thinks about it and may have to send back to factory which John has already told me can be done. In case I did not receive in time Didi has a stock unit that I will buy from her and wear until mine comes back. At least I will have 2 current systems and be able to try out a stock unit. So I guess going to hold off with knot sealer for now.