Glossary
Chalk storage
Cap on, out of heat, upright. Alcohol leaves an open bottle.
Store liquid chalk with the cap closed, away from a car dashboard in summer. Heat and a loose lid drive off the alcohol, and the chalk settles into a plug. If it separates, a gentle shake is enough. Do not add water unless the maker says so. Water changes the formula and can spoil a cream.
Loose chalk wants a dry, closed bag. An open bucket in a humid room clumps. That is the hygroscopic mineral doing what it does.