I just recently made my first ever batch of home brew after reading about it. I didn't follow any recipe as I like to start experimenting right away. It was a 10 gallon batch and I used Nottingham dry ale yeast. I used the yeast because it got great reviews as being a fast fermenting, versatile, neutral yeast. I followed the directions and re hydrated it for 15 min in in water at 34 degrees. then mixed it up and let it sit for 5 minutes. then I slowly added it to my wort which was at 69 degrees. I added it slowly mixing the wort as I added it. Its been 3 hours now but there does not appear to be any fermenting activity close to the airlock or stopper. Im not using a see through primary fermenter so I cant see whats going on but it does not appear to be fermenting. Should I lift the lid to check, do nothing, or add a different strain of yeast. Im worried that my yeast could have been dead.