I used about 1/3 packet of 34/70 dry lager yeast about 6 months ago, then crimped and kept the rest in a zip lock bag in the basement. Would the remaining yeast be good to use for keg conditioning? I naturally carbonate my kegged beer with fresh wort, the batch I’m set to keg and krauesen/keg condition is an Oktoberfest fermented with Omega Bayern Lager.