Anyone have ideas what this might be. Looks like water on my leaves but...

I've been seeing this off and on for the last month or so. It looks like water on my leaves, but it's kinda sticky feeling and if I wipe it off it leaves a residue on the leaf. Doesn't seem to be affecting the plant at all, I'm just curious what it might be. So far it seems to be located in one area, and only on one strain in the tent.

sugar-laden water leaking from phloem or xylem. Totally harmless just plant sap

It is water. From the plant. Two leaves were touching, and the transpiration from the bottom of the leaf got stuck to the top of another leaf. This can be bad if you have it happen too much, you can get mold and other problems.
solution: more wind, to ruffle the leaves up
2) trim of leaves that touch.