About 6 months ago a gorgeous Persian cat walked through the back door and curled up on the sofa. She has a very gentle nature and is great with the dc. She visits every day and most evenings we have to put her out when we're going to bed otherwise she'd never go home.
We have asked around the neighbours but no-one knows who owns her. The problem is her coat is a mess and she has fleas. I have been grooming her regularly and have treated her fleas, but over Christmas when the weather was terrible we didn't see her for about 10 days (she hates getting her paws wet!) and no-one had groomed her and she is in a dreadful state. Dh and I are contemplating washing her and cutting out the knots, but she's not our cat so we can't really. On the other hand, her owner doesn't take proper care of her.
Also, the treatments I got from the petshop, a liquid put on the nape of the neck wasn't very effective, I think she might need something stronger. TBH I think dh is right when her says she needs to be shaved and start all over again 
Poor kitty, she is so lovely, but such a mess.