I never was aware of the compartment in my dishwasher where it allowed rinse aid until about a year ago. Even then, I never used it. I'm not sure why I didn't since I had heard that using Jet Dry worked well in drying the dishes. That's one thing that slightly irritates me about all dishwashers- that the dry cycle never really works and I always end up having to towel dry most of them, especially the cups and bowls on the top rack. I've used many different dishwashers and have yet to come across one that actually dries the dishes. A week after our recent move a few months ago, we got a brand new dishwasher. Surprise! Even brand new, the dry cycle didn't even function correctly. Back to the hand towel drying method. We received a small trial size of Jet Dry and I tried it even though I was aware that it's made of chemicals. It worked well in drying my dishes! I loved that but did not like the fact that it contains dyes and synthetic fragrances.
I now use distilled white vinegar for my rinse aid and it works great. It assists in the drying process, is very inexpensive, and does not leave your dishes with the vinegary smell (that I despise).