Hey! I like the clean look and know what to put in there! LOL I haven't tried meth but I know I'm dangerous when I'm bored:
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DOT3 and 4 can be mixed fine, but DOT 5 is silicone and a bloody nightmare to flush completely to get solid brakes back
They say its better now, but not IME. That sucks buddy, but the satisfaction of tossing that nasty mix out of the Mity-Vac bottle is worth it. Honestly, I'd yank the caliper and disassemble it, flushing the lines in the process, even a tiny amount of 5 in there will haunt you.
Evil: No. Just no. please.... no. Ya, it's your bike and all but, no