I use cornstarch with essential oils mixed into it. I just use a bowl and a tiny wire whisk to mix my desired combination (your tee tree oil would work with something else for a more pleasant smell). You might try an essential oil (roll on) as well but be sure to use a carrier oil so as not to sting. Coconut oil has amazing healing properties as well. Be clean, and dry, lather up in the coconut oil, air dry, ( I soak up the oil like a sponge) follow with your powder combo. And yes cutting out the sugars helps a great deal.
I keep my powder on the vanity in a pretty container with the big soft puff for application. Makes me feel better just Dustin up.
It has been harder to keep dry because we are out most of the day doing yard work, but the routine,sometimes more than once a day surely helps me. I had to really make the effort to cut out the sugars, I was on a binge, so not good with diabetes, and did notice the difference when better choices were being made though. Praying you have success in what you try