Yes, you can put a dishwasher tablet in the bottom of a dishwasher. In fact, that's where most dishwasher tablets are designed to be placed. The bottom of the dishwasher typically has a dispenser or a compartment specifically meant for holding the dishwasher detergent or tablet.
When loading the dishwasher, make sure to remove any food debris or large particles from the dishes and utensils before placing them in the dishwasher. Then, follow the instructions on the dishwasher tablet packaging to determine the appropriate dosage. Usually, you'll place one tablet in the designated dispenser or compartment at the bottom of the dishwasher.
It's important to note that dishwasher tablets are specifically formulated to dissolve and distribute properly during the wash cycle when placed in the designated area. Placing the tablet in other parts of the dishwasher, such as on top of the dishes or in the silverware basket, may prevent it from dissolving properly or impede its effectiveness in cleaning the dishes.