Dishwasher won't clean properly anymore.

Question

The unit started making a new & different noise that sounded like water squirting inside. Since this began to happen, it won't clean properly & leaves food residue on dishes & in cups. It still makes that "different than usual" noise. This has been happening for about 2 weeks now. When the cycle is finished all the soap has been used like normal & changing brands of dishwasher detergent has no effect on the problem. It's a Maytag mdb3100awx.Thanks!