remove the top cover of the machine,(power off) and disconnect the flexible hoses from the dispenser. Check if theyre blocked. The dispenser itself can be separated - generally held together with plastic clips. Clean out any crud or hardened detergent. Top generally slides off towards the rear of the machine after removal of screws at rear.
Check out my site for info: www.2ndwave.co.uk/manual.html
dan, March 2008