Help, Peggy! Or anybody else that may know! I removed the Sani-Potti from my new-to-me H26 to thoroughly clean it. After washing, scrubbing and sanitizing, I left it outside to air dry. Went back the following morning and it seems my dog (chewing machine) ate my homework. That is, the fill cap/vent cap. I did a Web search with no luck. Where can I get a replacement cap?