How To Clean a Filter Sock ?

[DiverDude]

Can't believe I'm asking this but I'm at a point where my sock is clogging in about 24 hours so I'm clearly not getting it clean enough.

When it was new, it was good for a week. After each successive cleaning though, it overflows sooner and sooner.

Presently, I turn it inside out under running water and rub, wring and scrub it with an old toothbrush but the material still seems 'impregnated'.

I'm at a loss. Other than to take it outside and have at it with the pressure washer, I can't see how this is going to get clean.

Thoughts ?