Leak where flex tubing from dishwasher attaches to bottom of sink
I am beyond frustrated. Have new dishwasher and recently had kitchen granite countertops installed with a new sink. Plumber who now has been out 3 times cannot seem to fix a leak where the plastic flex tubing from the dishwasher attaches to the bottom of the sink. As the dishwasher is new the plastic tubing is in new shape with no other leaks only where it is attached to sink.
Can anyone tell me how I can fix this myself? I thought of wraping connection with electrical tape but realize this would only be a temporary fix.