1, do not use too much strength to pull them out. This is a technical work, not by brute force
2, if you have too much hair, you can repeat it many times and try to get a little hair out every time.
3, dogs, cats, people and other hair can all affect the clogging of the sewer (if the problem of clogging outside the hair, it may not be solved)
4, when you receive the product, they will be curly. But it doesn't affect you using them. Before you use it, you'd better get them straight (in fact, it's not difficult).