Hi Gurkan, yep understand that with UHT you can skip the cook and denature step, but here UHT is rare and thus about 3X the price of regular store bought P&H cow milk. That said I'll but a liter/quart and give it a try.
My wife bought the non-fat powdered milk, once that's gone I'll try the whole dry milk, or I could also buy whole rather than 2% milk.
On using water around container, good idea except I assumed my/our unit did not have a thermostat, but just a dumb heater so if added water it wouldn;t go or stay at correct temp.
Cut the grass, at 102F tonight, wow.