I have an old MW incubator with 6 trays. Has anyone had problems with humidity? I have a baking pan in the top and bottom with a sponge in them and I can't get it above 41% for lockdown tomorrow. I know it won't help me with this hatch bit has anyone had to seal theirs with some kind of wood sealant? I have a pretty good hatch rate but last time on my test hatch of 4 eggs, 2 weren't fertile, 1 died early and the last one stuck but survived. Has anyone did a complete restoration of these old 'bators?