What kind of diffusers are good for use in the bathroom?

Since the weather is humid and it is the rainy season, there were musty smells all over the house.

I really hate these smells, so I want to place diffusers or scented products here and there, but I find strong scents off-putting, so I wasn't sure which product to choose or how it would turn out.

Do you happen to have any products you would recommend? What scents do you like?