I had my first UTI after my TKR, too. It seems to happen for some reason. I ended up getting them frequently and went going to a urologist. I was doing one of the worst things I could do for cleansing. I had been using antibiotic wipes and killing off my good bacteria. Make sure your wipes do not contain an antibiotic. My urologist recommended a bidet for cleaning and since I've been following her advice I've not had another one...praise God! I hope these suggestions will help you.