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As you tap lightly on the head at each tension rod (about an inch in from the counterhoop), slowly tighten them.It works well if you start at a specific T-rod then move across the drum to the opposite one - then move two over - then across - and so on.Using a clean cloth, rub it in thoroughly until it disappears.This is something that need not be done more than once a year.
They have pressed counter-hoops and a sharp angle around the bearing edge.
When you're satisfied with that, flip the drum over and do the same on the top head. For the bass drum, tune the heads as loosely as possible - just enough to eliminate any wrinkles.