Red dust is an indicator of bad powder. Even though powder should have a life much, much longer than 17 years, it sounds like yours has gone bad. Most likley cause is some sort of unsealed container, improper storage, high humidity and/or heat.
Still happily answering to the call-sign Peetza.
The problem, as you so eloquently put it, is choice.
He is no fool who gives what he can not keep to gain what he can not lose.
-Jim Eliott, paraphrasing Philip Henry.