I have a Masterbuilt digital 30"smoker. I am noticing that often the second batch of chips don't ignite. They often leave the smoker tray full with partially burnt chips. I have read on some Masterbuilt forums that some people drill a series of small holes in the chip tray to help with combustion. I have also read that some people put the tray right on top of the coils to ensure ignition at lower temps. Are either of those ideas good solutions to this problem? It seems to be a common issue with the owners of this model. Apparently Masterbuilt raised the height of the chip tray on these new models and it is causing problems. Anyone else aware of this issue and what do you do?