Klorane's hypo-allergenic dry shampoo really gives the stuff in the salon a run for it's money. Just shake the bottle, spray it onto your greasy roots, let it sit for a couple of minutes and brush it out. Unlike other dry shampoo's the nozzle on this product isn't prone to clogging. Most importantly, it really works and leaves my hair looking clean and shiny without any residue.
I've been guilty of overusing this product and have gone as long as 5 days between washes! The results are always good as long as you don't over spray.
Klorane can be purchased at Shoppers in the hypo-allergenic section for $10 (CND) or at Sephora for $18 (USD).