anyone use damp-rid to lower humidity in there grow?

If so how did you use it should as far as placement in the grow i grow in a 5x5x7 tent?? Sometimetimes my humidity goes up to 68 im in 4week of flower to

Yes I have used it and if you are looking to lower your humidity a bunch damp-rid isn't going to lower it much more than 5-6% so your gonna need like 3 or 4 and they wont last long.

I just put 2 in my tent.i was hitting 55-60% with the lights off.hope it helps.dont need mold