I'm having trouble keeping the humidity stable. When I tilt it, depending on which way it's turned depends on the humidity. For example, turned backwards, the humidity rises up to 60%, not turned humidity stays about 50%(and it constantly changes) , and forward, well, I don't really know. Overnight is "scary" for me, because I don't know what it will be in the morning. The past several nights I go to bed and it's at 60% and in the morning it's 40%. The lid is on correctly, I check every time I open it. And when I tilt it either way it spills out. And I'm not filling very high. About 3/4