stirk
Burner
Try taking the wheel off the bike, pump it up to about 40 psi and wobble it on its sides for a while. I had the same problem on a newly mounted tyre and now it sealing fine .
I'll persevere for a while longer, I'll submerge in a pool and see where it bubbles might be a problem with my valve or rim tape.
I thought you must have been scrubbing the wheels with some kind of brush while you were washing it...
I only ever light hose my bike down, never even use soap, it always looks dusty.