On Thu, 24 May 2012 13:09:03 -0700, Steve B wrote:

At 75 psi from a washer, you are destroying the filter.

The filter is a little ragged. It seems to be best to aim at an oblique
angle, so as to just blow off the green slime.

I would soak it first, if you are having this tenacious
of an encrustation.

I guess I should have explained better. The green stuff comes off rather
easily. It's just that there are something like a thousand (or more)
folds.

So the problem appears to be mechanical or solvent.

Mechanical: How to get INSIDE each of a thousand folds!

Solvent: How to dissolve the stuff without having to get inside each of a
thousand folds.

I'd try making a spinner.

That might work. The problem though is that the folds are densely packed
so the problem is spreading the folds, somehow.