I use the sprouting jar and I don't prop it, I just put it down with the lid side up. Everything sprouts fine. I do mung beans and lentils in the cupboard over my sink. I am using up a bunch of black mung beans that my dh got at the Indian food store, they make delicious sprouts but it is tedious to get the seed casings off and they aren't pleasant to eat with them on. Right now I am sprouting fenugreek for the first time! I know I want it to "green" so I have it on the back of the sink.
Lentils are the best though. You don't have to remove any hulls, they taste great, and they make a good curry.
There's a company that sells seeds and sprouting equipment that has a website with lots of sprouting advice and sprouts recipes. You can find the site at:www.sproutpeople.com
I am not affiliated with them in any way, I've just enjoyed googling over there and finding interesting stuff. They have information about how to be safe about food borne illnesses and sprouts.