To the OP, I too have heard this, but I think that it works better when you decrease heat and decrease humidity. Mother nature does it best, and typically this is what happens to the plant outdoors. Also, some people swear upon a 36 hour period of darkness before harvest, to encourage the plant to make one more push of trichomes. Personally, I would recommend using Gravity, it basically gives a chemical signal to the plant that the end is near, and it makes that last trichome push without all the extra work. Your buds and calyxes will harden up and and you may notice a thickening in the "frosting" layer.