Chemex - Funnex not for use with direct-pump machines Clean your automatic coffeemaker more efficiently with this coffeemaker cleaning solution from Chemex. This unique cleaner is odorless, easy to apply, and environmentally safe. One use lasts 2-3 times longer than other cleaning methods and leaves your coffeemaker sparkling clean. This solution is intended for use with Chemex automatic coffee makers, and is not for use with direct-pump machines.