I started an ale with OG of 1.131 with an ~2L starter using Wyeast 4347 Eau de Vie. I can post the original recipe if needed. but after 3 weeks in the primary, the gravity has only fallen to 1.071 and has stuck there since week 2. The yeast should be able to handle up to 21% abv and its only at 8.3%. It does have a low flocculation rate. And I have been keeping the temp between 65 and 70F, basic room temperature. So what would be the best way to restart the fermentation? Should I prepare a new starter using the 2L WLP099 H.G ale yeast? I originally planned on using it but had to settle for the Wyeast. My aeration wasn't the best either.