I have a problem with the soap dispenser drawer in my washing machine. It doesn't seem to fill with any water - at the end of a cycle the soap powder is always bone dry and the softener is untouched. I've tried all the tips for cleaning a scummy drawer i.e. ran on hot wash, crystals, vinegar, cleaning the drawer and back of drawer throughly etc. but it seems this isn't the problem, it's that no water is even getting into the drawer. I've also scrubbed the holes in the roof of the drawer to make sure they're not bunged up but still nothing. Any ideas? Ta