In February I brewed a delicious Milk Stout. I bottled and waited patiently. Sadly, after several weeks they were flat. I waited. Still flat. I waited more. Same thing. I'm not exactly sure what went wrong. I bottled with ~3.61 oz's of corn sugar and let set in an appropriate place. I've never had issues in the past, nor since, when bottling.
I still have a lot of bottles left. I'd like to get them carbonated.
I was thinking I'd hydrate some yeast (I used US-05), pop all the caps off, add some yeast, recap, and shake them up.
Thoughts to this approach?
My challenge is I'm not entirely sure how much yeast to add. I also don't know if I should add sugar too, or if I should just add sugar.
I'd love to hear your thoughts.