I have now experienced it. I have had my 3 IP's for several years, and I use them weekly. I have read numerous posts about stinky seal rings. Never dealt with it until now. I washed, I soaked in vinegar water, I washed, I soaked in bleach water, I tossed and am replacing. Once you get a strong stench in one it truly will not go away. I kind of thought ya'll were crazy when you complained about it. So strange, years with no problems then BAM! Stink, bad stink! I now feel your pain. Luckily they are cheap to replace. I have some spares already but I can't find the blasted things, so I am ordering more.