There is much experience and knowledge contained within the membership here. Sometimes things get lost when we post individual issues which can disguise things which are.. Generally Speaking .. held to be truths based upon the experience of a large group of folks here.
So one to start:
Generally Speaking...
Humidity beads are the humidification device of choice (60 or 65%) for a large percentage of folks here for smaller humidors and coolers. They are reliable and eliminate mold issues related to other sponge type devices.
There are several sources for them but here are 2:
Smaller devices typically for desktops:
www.cigarmony.com
Larger quantities with tubes/sacks for travel, cooler etc type needs:
www.heartfeltindustries.com