My cat was having issues with her litter and she gets on and pees frequently a few weeks ago that I bought her drops for UTI from the brand Homeopet. I made the mistake of buying another type of litter when the hurricane Dorian was supposed to come because her original litter ran out. The old litter got stuck to her bottom and t was a mess, I have been cleaning her with water, but I noticed it has irritated her skin and sort of red. I'm worried because she is 18 years old and I don't have money to take her to the vet.