loosen your grip
US /ˈluːsən jʊər ɡrɪp/
UK /ˈluːsən jʊər ɡrɪp/

1.
to relax one's control or hold on something or someone
:
•
You need to loosen your grip on your children and let them make their own decisions.
•
The climber had to loosen his grip on the rope to adjust his position.