I have cold smoked multiple types of cheese including cheddar, mozzarella & colby jack. I have only used Tillamook Cheddar except one time. My question is my last batch didn't turn out as smoky as other batches. It's just over 1 month old and had a piece that was smoked about 3 months ago...the older cheese has a bolder smoke taste which I like. Both times I used Pit Boss hickory pellets for 4 hours, flipping every 30 minutes. Any thoughts?