Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Fixable - with a lot of work

This product is great for a while, then gets worse and worse. Company doesn't sell a replacement brush block. I've had two of these. So I took a tip from another reviewer.I removed the insert block and took a large pair of shears to cut off many of the tines at their bottom. I clipped away about 1/4 inch from the outside edge of all the tines. Basically that relieves the pressure inside, and I'm able to use the block again.It's not an easy solution, but it did work. The company should simply sell a replacement for the bristles block for say, $15, and I'd keep buying them.