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 and the cleaning cycle is activated， the machine cleans itself， including the lines， brew box and all the other areas the liquid coffee runs through. Simply open the panel door and place the tablet in the machine's funnel. Tablets come in a jar that screws tightly closed to keep them dry until use.