You definitely want to change yeasts for a hefe. WLP380 has worked great for me in the past. Save the Notty for the next Pale Ale or IPA you do. It is dry, so will keep for a long time.
"I brew with a water cooler and some part from the toilet." - JohnnyO
"I do gravity feed the last gallon or two through my Therminator, but I expect you could suck start a Volkswagen before you could suck start one of these. - GilaMinumBeer
"..... Bull was right." - TXCurtis