I got some old malt extract from a friend and brewed a hazelnut brown two weeks ago. After pitching the yeast it fermented slowly for a few days and then quit. Gravity now reads 1.120 (don't have an OG b/ca my hydrom. was broken, but the recipe says the target OG is 1.052). Is there any way to kickstart it again? It's at about 68 degrees currently.