Cleaning tablets keep your BUNN Sure Immersion Bean to Cup machine functioning smoothly for fresh, expertly extracted coffee one cup at a time. Once the tablet is loaded & the cleaning cycle is activated, the machine cleans itself, including the lines, brew box & all the other areas the liquid coffee runs through. Simply open the panel door & place the tablet in the machine's funnel. Tablets come in a jar that screws tightly closed to keep them dry until use.