When using a dishwasher it can sometimes be hard to gage how much detergent to put in the tank(s). On top of that, it is really easy to spill powder and liquid detergents. Most people buy the bulk size detergents in order to save money, then end up making a mess when they fill the detergent trays the first few times.
Stop dealing with all that mess and waste! I use Cascade ActionPacs, which is a tiny tablet/pouch of detergent and rinse aid in one. There isn't any measuring, spilling or waste. Simply open the package, grab a tablet and place it in the detergent tray. If you have a prewash and separate wash tray with a lid, I'd put it in the lidded section. Now you are ready to run your load. Be sure you always keep the tablet package or tub (depending on the quantity you by) sealed as tightly as possible. If moister gets into the container they tablets get slimy and sticky.
Cascade ActionPacs also has the grease fighting power of Dawn to help your dishes come out sparkling clean!