the metal has a small hole on it make sure it is clean and keep that red plug removed so that it draws fresh air in i think that then the humidity will be ok
if it is still high remove also the other red plug i always use them with both red plugs removed
I have 2 of them they are very old models (no model number just hovabator) i have them more than 20 years
they have two water channels one longer and one shorter for the first 18 days
you fill the short channel and for the last 3 days you fill both never the center
by the way the motor draws a...