I bought a Trinity Red Wine Expert's kit off of Amazon. I will never do that again, it looks like it's very old. The wine experts label was covered with another label so I could not see the manufacturer date. I decided to go ahead and make it anyway. I noticed as I was sprinkling on the yeast, the yeast looked old. I'm planning today I'm going to the brew supply to buy more yeast. However, I noticed that the airlock is getting bubbles. Would it hurt to add more yeast?