Usually I keg,but all of my kegs are in use so I had to bottle without force carbing. I used gelatin in my secondary for 1week then cold crashed 3 days. It's been a long time since I bottled with a primer but I used 3/4cup sugar for 5gal,and as I used to I filled 1 plastic bottle to check carbonation. After a few days I cracked the top and.......... Nothing. Any thoughts? Am I checking too soon? Are there just too few yeasties left to carb it up?