My Bosch Exxcel 1600 keeps on breaking down?

Time and time again stuff keeps on getting stuck in the filter (the round one at the front behind the lower panel) and it will not pump the water out. It's a right old game draining it through the little black hose and forcing the filter open etc. I can fix it, but it takes ages and is very messy.
I have had words with the family about it not putting coins and pegs in it - to no avail. Does anybody know why this keeps on happening and if there is anything (else) I can do to prevent it. Any mods? Thanks, Mike