This cat is elderly though and needs help to clean herself. I took in a very elderly cat some years ago that was being neglected and never allowed in. He stunk and was filthy. I just filled a sink full of warm soapy water and placed his bottom half in so a lot of him was still out of the water and very gently wiped him down with a flannel. He didn't struggle and allowed me to gently clean him. The muck that came off him was heartbreaking, but watching him cleaning and licking himself after was well worth it, he must have felt so much better. That little puss broke my heart. At least 20 and thrown out by his heartless owners. I realise this may not work for you crosspatch, but would it be worth a try ?