Is your place air conditioned?
note: Air conditioners (to reduce warmer temperatures) are also de-humidifiers. That's why you never see little driplets on a cold beer or soda pop glass/cans in air conditioned places - it's also why humidifiers are often needed in baby's rooms. Adult humans don't need humidity so much (we have bigger systems and the ability to get a drink when we want) - but some humidity is good for babies - as a general rule.