I gotta say PBW is amazing stuff, I needed to fry the crud out of my spider because it had gotten pretty rude looking up close.
To wit...
Yuckers.
I made up a 6 gallon bucket of 1 oz/gallon PBW using 130°F tap water and let the spider soak neck deep. Swished the spider around the bucket a bit after 30 minutes, then gave it another 30 minutes soak before rinsing with hot tap water.
Et voila:
Yes, it's pricey, but holy cow this stuff is magical. I've been pumping it around my rigs for years but you can't see the inside of a hex to appreciate how well caustics can work.
I do have the ingredients to mix up some ersatz PBW which I should get to one of these days.
btw, the pH on the 1oz/gallon mix was almost 12...
Cheers!