Hi, I have bottled my first batch and have added sugar for carbonating as requested in recipe. The beer came out very flat with no gas or carbonation. Nearly all of the bottles I opened were the same. I opened all of them again and added twice sugar as rrequested in the recipe. I am still waiting to see what will happen but I just opened one of tthe bottles just because of my curiosity. It was flat again. I need to mention that the bottle I opened stayed in room temp for 5 days only ! Any idea how I can fix this issue? Ps.: I use flip top ceramic caps and also normal bottle caps.