I;m still new at this brewing thing and really love it, but learning as I go. I have been running into some carbonation issues. My first batch, a pilsner all malt, 5 days in primary, 18 days in secondary, added 5 oz priming sugar, mixed with a little water. Fourteen days later first sample good taste and great carbonation, very happy. Ok second batch, a coffee stout porter, a malt extract with grain. 20 days in primary ( troubles getting SG down), 16 days in secondary, bottled with 5 oz cane sugar mixed with a little water. 2 weeks later, all excited first sample was a disappointment, very little carbonation. I uncapped all 36 bottles added 1 tsp sugar and ½ tsp yeast starter. 2 weeks later WOW very good, great carb , very happy. Ok now third batch, a nut brown ale, malt extract with grain. 14 days in primary, and 14 days in secondary. Bottled with 5 oz cane sugar mixed with water. 14 days later first sample, another disappointment, very little carb. All three of these batches was kept in a room between 65 to 75 degrees. Any ideas on what Im doing wrong. I thought it might be the cane sugar , but that is what I use to recarbonate the stout porter and it worked good the second time. Im open for suggestions. Thanks