I use Liquid Grip during the summer when sweat is an issue. There's almost no dust. It's very easy to overdo it and get a lot of grab, which can be good for the occasional very humid day or for trying something at the very limit of your grip capability. But used like this everyday I found it tugged on my callouses severely. Now I use it very sparingly (a blob the size of a cotton bud tip) and ideally not at all. I've found that going without challenges (and improves) my hook technique and my grip strength. Cleaning my hands with washing up liquid beforehand (to remove some of the natural skin oils) is usually as much as it takes this time of year. In the summer I might give real chalk a go again as I don't remember it having as dramatic an effect as the liquid stuff.