I too have a himlayan and grooming is a daily thing, so I try and do it in small sessions. If I let it go too long he gets mats. You can either use a scissor (carefully) and cut them out, but if they are too matted, you'll need to go to the groomer and get them cut out or shaved.I usually just have them shave his belly where the mats get bad. The groomer we found was wonderful and she showed ways to brush him so it didn't aggravate him as much. Unfortunately, it requires more patience! Good luck.