So thinking back to when I bought my TNT, it's been about a year now, and I remember reading (either on CarolinaPetSupply.com or on the product sheet it shipped with) that TNT supposedly expires in 1 year. Now I have kept it in a dark, cool, closet, and have quite a bit leftover, I would guess that it has stayed good. But I'm curious as to how many of you have kept it, or keep it longer than 1 year? Or would you recommend getting some new stuff? It looks the same as it always did, and doesn't smell funky, and there's no bugs making their homes in it.