i have a 2 year old Bosch Exxcel dishwasher that will not drain. The water light comes on because there is water sitting in the bottom. Filters were reasonably clean on looking further into pump (by removing screw top) found 2 small pips, have removed but has made no difference. Drainage pipes appear to be clean and free of kinks. Undid side of machine, there was a plastic panel which appeared to have some debris, have rinsed it out and have cleared some debris but no difference - Can you help?