Revival of an old thread, today I had to clean my window washer pump filter housing after checking why I only had low water pressure on my windows whiping. Clogged filter. Got the pump out, filter out, cleaned it, all back again and works very fine again. Here some images, sorry do not know why they stay landscape instead of portrait but you can see the amount of dirt on the small rubber filter.
Cheers from Holland,
Emiel