Whether you bought your ukulele for $1,000 or $50 it deserves special care to always sound its best. That means protecting it from the very real dangers of dry air which can cause warping, splitting, peeling, and cracking. Humidifiers are designed to keep your ukulele in a more temperate zone by releasing moisture into the uke itself. A bit of a chore but worth it in the end.
There are many kinds of humifiers on the market ranging from around $5.00 to $20.00 and up and most will work fine. They can be purchased at any music store and of course online.