let the bow grip run along the meaty part of thumbwith ur wrist slightly bent up.hard to describe in words.you are probably gripping the bow with your wrist srtaight out like your shaking hands or pointing with index finger this is a high wrist grip.Sometimes this can cause the string to slap your arm.happens to me if I go awhile without shooting my bow.Thats why I never move my sights after a lengthy layoff from shooting I wait until my form returns.You will get yours back too just relax.