So, my 30 yr old Grocco toilet and lines are being replaced next spring (our next sailing season here in Michigan) with new products. The toilet is DONE....it's joker is cooked, the pump handle leaks, it won't keep it's prime and worse of all.....it smells like a men's urinal. I was very interested in replacing the old Grocco with a new Grocco, especially if I did not have to drill new holes. However, no such luck so I am going with a new product. While talking to a very nice guy at Grocco, he told me that they have had the BEST luck for many years with a product called "Sew Clean" by Trac in efforts to clean returned products for repair, smell, etc. The responses on this forum call for "KO". Has anyone used Sew Clean? Not to discount other people's suggestions but.....it seems as if someone who is in the potty business might actually know what they are talking about. I want to start my new toilet on the proper path right from the get-go. I have no opinion on the matter b/c my present toilet smelled so bad anything has to be better, so what works will be the one I purchase.