I cant help you with the tail since my boys tail is easy to get into and never dirty but for the face wrinkles the best stuff ever was malaseb wipes which are impossible to find now, company went under. Have switched to a comparable wipe called mal-a-ket wipes. They come in a little tub and look like stridex pads I guess. First I clean the wrinkles with a baby wipe then go back over them with this and the wrinkles really stay much cleaner longer and no infections. I would think it would also be ok for the tail but would get other opinions for that one. As for the bath only every 2-4 months, I would say more often is better although I do have to admit that since having our baby the boys dont get them as often as they used to either. Mine are not out in the dirt tho and 99% in the house so it isnt like they are "dirty" so much. I would say at least 1 a month tho for bathing at least is what I would prefer for my boys. Used to be more like every 2 weeks tho. Honestly for washing I just use baby shampoo and conditioner and my boys are clean and soft. I am sure others may prefer other shampoos and stuff but for me it works well and the boys have great coats.