Try just relaxing and have a clear mental image of the sound you want to produce.
The 'pat' answer to all musical problems in the world --the only true method for anything pianistic and musical -- the real secret to success .
Ah, the InnerGameofTennis approach.Works superbly if you have that learning style hardwired into your brain.Fails utterly if you do not.And since so many teachers do have that style, they will never believe it doesn't work for you, simply accuse you of doing it wrong.