[HayZee518]

ok let's examine what's changed since you installed the dishwasher...... just the dishwasher, the discharge hose and air gap is the same, the water inlet is the same. I trust the thing is levelled and secure to the floor. Only thing I can figure is the discharge hose that goes to the air gap retained a bit of the previous water and fed back into the dishwasher by gravity. You see the motor acting as a pump really can't totally empty the tub because after the tub is empty there's no water to pump, but when the thing shuts down, what water is left in the discharge hose, because of the air gap, bleeds back into the tub. When it fills up, that water mixes with the new water and has some soap left in it so it washes with used soap and you add more detergent to the new load so it just keeps building. it's miniscule but enough to cause you headaches.