Trick # 2. Try not to touch the client's palm. This may stimulate the hand to close.
Trick # 3. To open the hand, start by bending the wrist slightly 1st. This is how police get people to open their hand to drop a weapon. Bending the wrist relaxes tendons that cross over the wrist before they go to the ends of your fingers.
Caution: Aim for a small amount of wrist flexion (see angle in photo). As the tendons relax, the fingers will open slightly so you do not have to pull on fingers curled in a tight fist.
Trick # 4. A fist will relax even further if you straighten the thumb. The thumb has half the muscles in the hand so it is a bully. The trick is to wrap several fingers around the base of the client's thumb rather than pulling with the bony ends of your fingers.