Another good substance for cleaning glassware is Peroxymonosulfuric acid, also knows as Caro's acid (just take a look at Wikipedia)

Better you wouldn't do that sysh writeup by word. The basics mentioned there are true, but the result will be a very impure reddish product that contains every trash you can imagine. Most of them were formed until heating the solution after the "stormy reaction" is over (to improve the yield). Sure, waste is also some kind of yield. 
There are serval ways to get rid of the impurities when the reaction is over. The best method is doing a steam-distillation, followed by an A/B extraction, and then cristallyze your product. If it has dried in the air, do a final wash with acetone and dry again. I must admit that is not as easy and cheap to do, but finally you will receive a much cleaner, better and stronger product.