It just occurred to me to share with you something I learned on the US island of Guam, when the DrsC spent a year there as visiting faculty. The Guam climate is tropical, humidity ranges from a low in the 70% range during the 'dry' season to a high near 100% in the truly wet season.
This is a pro tip one of the longtime haole residents shared with us, to prevent mold growing in the shower. Leave the light on until the walls and floor are dry. On Guam that sometimes meant you didn't turn it off for weeks. The theory is that mold only grows in the dark.
We followed the advice and it worked. So when we got back to the US mainland we kept doing it and we never get mold in the shower. Here, we live in two low humidity regions - WY and NV - so it usually means leave the light on till we go to bed.
BTW, Guam is a great base from which to see Asia. The flights are much shorter and cheaper. We traveled to Japan, China, Taiwan, Australia, and New Zealand on school holidays.

















































