My humidity here is 65-90% on average. That does not seem very high but leather shoes that are not worn, turn mouldy in a week or two and biscuits left on the table goes soggy in a couple of hours!
But the strange phenomenon I observed is that droseras grown in tropical weather here do not have as much dew as their kind in temperate countries. They tend to be drier here when the humidity is higher. And that they suffer from root rot more easily.