What Jo says is perfect advice. I do the same, keep foam on the rolls and keep the mill covered when not in use. I am not in a humid shop, but have seen some real messes of rolling mills … so I always keep a light coat of oil on the rolls and rotate the gears every week or so to make sure it stays distributed (remember, 5 to 1 gear ratio means you have to turn the handle 5 times to get the rolls through one full rotation. You probably want to clean the oil off the rolls before you roll something (just wipe it off) and re-oil after you are finished. I’m probably over doing it, but a rolling mill is an expensive investment and it is surprisingly easy to destroy or seriously damage it doing stupid stuff … or ignoring it. Jo’s advice about making sure everything is absolutely dry is spot on, that includes organic material if you are roll printing. Don’t let fresh leaves for instance touch the rolls. I also am very careful to make sure I have removed all the acid from the pickle, because if you are annealing between multiple passes (and you’ll have to if rolling down ingots) you are going to have some pickle on the metal. Never try to roll something really hard like titanium or tool steel … seems obvious, but it happens. And … I have to mention this because your mill is in your home - keep small children, curious teenagers and idiots away from the mill. I’ve read horror stories about kids running nails through a rolling mill and you can imagine the results. If you manage to get pits or a nail groove on the rolls … it ain’t coming out unless you send it back to Durston to be reground. And like Don says take small bites and anneal often … I’ve heard of folks breaking the reduction gears by trying to take too big a bite at a time. I wish that Durston would provide a comprehensive users manual with their mills, but I figure they think anyone buying a mill is going to know how to use and care for it.