The plant has lost all of its leaves probs due to lack of food (nitrogen). Which is in most cases is totally natural at this stage.

What you want to do now is look on the site for "When to harevst" or a "when to cut plant down" thread. You;ll find that nice picture of the Trichcombs (think thats the right spelling I should know that by now..dang) . They are the sugary crystals you describe. They might look real sweet but they are not sugar.

My guess is that your plant is reaching Harvest time. But perhaps not just yet. you should look around on the forum to find some pictures etc. About "WHen to Harvest"

Its a special Bond between Grower and Plant that is reached. TO early and its not worth it.. TO late and the moment has passed. Find your special moment with your plant and harvest her and treat her to some good curing. Then burn her proper!!!

Hope that helps

Good Luck

kd_special