I kep my WP-DC50 cracked open in a tupperware box with a bag of dessicant to keep humidity / residual moisture from settling in. Took the functional-but-el-cheapo humidity gauge from my first cigar humidor and stuck it to the lid - works good for me. Total cost about $5.
Love the jeweled CD case idea for the O-ring - fixing to get on that tonight!
Love the jeweled CD case idea for the O-ring - fixing to get on that tonight!