Rinse aid used up to Quickly

In the last few months the d/w seems to be going through excessive amounts of rinse aid - a small bottle seems to last only 6-8 normal cycles. I have the dial turned down to the lowest use setting, the dial and rinse aid door seal do not seem worn or damaged, and there is no obvious leakage down the inside panel of the door. Is it possible the whole detergent/rinse aid dispenser could need replaced??

Yup…