Dishwasher Detergent, Dishwashing Liquid, and Laundry Detergent

This morning I asked my husband to get dishwasher detergent. He thought I meant laundry detergent. So I reminded him while he was at the grocery store to get dishwasher detergent. Then he thought I meant dishwashing liquid. He comes home with laundry detergent and dishwashing liquid. There is no dishwasher detergent in sight.

I say, "Where's the dishwasher detergent?" He responds, "You were trying to play a trick on me. And that was a dirty trick."