High humidity in bathroom

[kpatnps]

Hi All,

I have a large walk in shower that we recently built. We have been noticing that our humidity is high when we wake up in the morning. For example, humidity will be about 55% at night, but then go up gradually to 60-62% by the time we wake up in the morning.

Could water or moisture be stuck somewhere in the shower and thus elevating the humidity over night? Cant see any obvious signs of leaking. Could water be stuck in shower floors and constantly giving off moisture?

Thanks