Remove, clean and reapply using either hairspray (apparently works well though not sure if heating it will reduce how effective it is) or some proper grip cement.
my normal method, and i don't know how it would work with OP's heated grips: fill grip with cellulose thinners for a few seconds, chuck out thinners, put on handlebar, but QUICK! it'll never move again
i've tried hairspray in the past, and it didn't work for me.