Hi, Looking for some advice really. I have an 18 year old rescue cat (had him 2 years) and he's not grooming himself so well now and developing knots. I brush him twice a week but he hates this and bites me so can't do it for too long. I don't feel like I'm getting on top of the knots and general scruffiness. Anyone got any ideas how I can get his coat under control bearing in mind he's a grumpy 18 year old fella when he's being brushed who cares not that he's getting scruffy! Any ideas really welcomed as I'm concerned the knots will become a problem eventually. Thank you!!