Diaper Pail Woes

I have been having a battle with my garbage pail for what seems like an eternity. I have a liner in the pail, but I guess boy pee is just made to be super potent ammonia smelling. Maybe girl pee smells this bad too, maybe it is just toddler/baby pee but I can't seem to get the smell out of the pail. I wash diapers about every 2 days or so, I was the liner, and I wash the pail, then I leave it out in the sun most of the time to dry hoping the sun will bake the smell out - maybe the sun is baking the smell in. Then I throw about a quarter of a cup of baking soda in the bottom, and a few drops of tea tree oil. Back goes the liner, and we are off for another few days. Now mind you, this is not a cloth diaper issue - when we used disposables, we had the same problem, and moved the garbage can out to the garage. I don't want to move my cloth diaper pail into the garage. This cleaning method is just not working to my satisfaction, so I have tried something else - I really hope this works better. I made my own deodorizer "cakes" today from baking soda, water, tea tree oil and lavender oil. I mixed everything up, mashed it into a muffin tin, and set them out to dry. It should only take about a day for them to cake up. This way, I can put a cake in the bottom of the pail, as well as in the top of the little ball where you are supposed to put some sort of chemical deodorant that the company who makes the pail sells.

I took pictures - if it works after 2 days, I'll post the pix and the exact recipe.