I'm a big cigar fans but have always bought ones in tubes. I have decided to branch out and try some different types (inc those without tubes). As such i bought a basic humidifier to keep them in tip top smoking order. But im confused!

The humidifier i've got is a tallish jar with a sealed top. It got a circular piece of wood and a sponge inside a plastic thing (with a grate ono the front). From reading some of the posts on here i take it you wet the sponge - but how much? what with? how often should i replenish it?

All advice is greatfully received.