work like a charm
US /wɜrk laɪk ə tʃɑrm/
UK /wɜrk laɪk ə tʃɑrm/
1.
to be very effective or successful, often in a surprising way
:
•
I tried a new recipe for the cake, and it worked like a charm.
•
The trick to calm the baby always works like a charm.