As promised a while back here is my guide/shared experience with things E8x washer / sprayer related.  Formatting needs a tidy up which I'll do if there content is useful/wanted or look at making a website/blog post or something as that might be easier.  EDIT: It's also worth mentioning that if your washer pumps are not leaking but you suspect you're strainers are gummed up....shoving very long plastic tubing (something from a fish tank place or similar) down into the tank and blowing