bosch classix 6 1600 express?

the soft rinse drawer does not empty fully, and after the wash is finished, there is at least 3/4" ins of water left in. We have had the machine for 4+ years and have never had this previously.We have put a Sainsbury's washing machine cleaner through, but it has made no difference, Is this normal and we have just not noticed it ? my wife tells me that it is usually empty after a wash . HELP!!