Oh that's really clever!! My mom used to have one of those old washers - I'm seeing it makes for perfect drainage.
It's hot season in Thailand and we have the opposite problems - seeds drying out despite being watered x 2 daily - it's actually on my list to make a little humidity chamber today using some old recycled plastic bottle so I can start some new seeds. Coffee first. 😊
Interested in how you irrigate in that climate. Thanks!