The beauty of KL is that it's so cheap and works just as well as anything out there..probably even better. Putting the KL in dry will give you an accurate reading in as little as a few hours but waiting for a day is a good idea. You can be creative as you want as far as how you put it in your humidor....I've gone the quick and easy route...small one inch by 3 inch tupperware container...fill it up and place it in the corner where I keep a mesh screen over it so it won't spill out. Rarely do I ever have to add DW except for the first time to regulate it to the RH I want. Usually, 1 to 2 spritzes will bring a 60% humidor up to 65% and that's what I keep mine at. A pound of the KL will only set you back $17 and it will last me probably around 10 years...not a bad deal!