Man with many vises
I learned this trick back about 10 years at a scroll saw show. I have never had a clogged bottle since except when my ADD brain forgets to put the bottles back where they belong.
This discussion gave me a lot of good ideas to try. Since I needed a glue bottle rack anyway, I’m trying Scott’s inverted storage idea first.
Storing upside down should make sure that I close after each usage.
BTW, the empty bottle on the right is quite old and the sleeve does slide much more easily than on current caps.