They're more like necklaces than collars.
Katy's is like that now.
So, after reading this thread, I decided to experiment with cleaning stuff on Mac's Blocky Collar. It always smells a bit like ass because he has so many skin issues and even multiple washings in the machine don't quite make it clean enough.
I filled a big pot with HOT water, added about a 1/4 cup of OxyClean and a squirt of Palmolive dish detergent, swirled it around, and then let the collar soak while I ran out for a couple of hours and took care of some errands. The collar is now unbelieveably clean and de-funked!!!
I'm soaking it again in plain water just to make sure all the cleaner is gone, then I'll let it air dry in the furnace room. I can't WAIT to see how clean and sparkly it looks when dry!!!
Never make someone a priority in your life when that someone treats you like an option.