Not to try to put a cat in the pigeons , but tennis racket handle tape , or pushbike handlebar cloth tape , around the hand grip , would get it nice and grippy .
Once took a tub of fine sawdust to the field . The differance from them oily hand grip to the handle adhearing to the palm , was stupendous .
Or ripping a strip of T shirt & wrapping the hand grip tight, and knotting , gets a firm hand hold . AND' would protect the gnatty paintwork .