Rotimatic recommends the use of Dispenser Cleaning Solution which was developed for the removal and prevention of impurities from the machine
Buy the dispenser Cleaning solution on the rotimatic accessories page
We recommend using citric acid as a close alternative. However, if you are unable to obtain citric acid, you can use baking soda/powder instead of citric acid but we have not performed any test using baking soda/powder.
Kindly make sure that the baking powder is completely dissolved to avoid pipe clogging due to undissolved powder.