I doubt that it is entirely the seal.
John:I doubt that this is entirely a seal problem. One of the things that we do is sometimes place a damp towel over the box lid. If this changes you cycling, you may be on to something.Does you lid have any seal on it at all? If not just go to Home Depot, Lowes etc. and look for their door/window insulation. They have some that is in the shape of a 'D' or a 'P' (we used the P shape). If you are going to put a piece on the box and another on the lid, you will want to get the smallest size available. This will keep the lid as level as possible with the counter top. The stuff has a self sticking tape back. Just measure, cut, peel and stick. Made a difference in our box not frosting nearly as much.