1-20 0.5-mL Sample Block ModuleCleaning the SampleBlock WellsClean the sample block wells once a month or more frequently if needed.8 If the cover becomes contaminated with amplified DNA:a. Raise the heated cover to the cleaning position.b. Wipe the cover with a cloth or cotton swab soaked in 10% bleach.c. Wipe with a damp cloth.To clean the heated cover: (continued)Step ActionTo clean the sample block wells:Step Action1 Turn off the instrument.2 Wait 1 minute for the sample block module to cool.3 Remove the reaction tubes and frame from the sample block module and set themaside.4 Use a cotton swab soaked in pure isopropanol to clean the sample block wellsthoroughly.5 Remove any remaining isopropanol from the heated cover before reloading thereaction tubes and frame.6 If the sample block wells become contaminated with amplified DNA:a. Clean the wells thoroughly with a cotton swab soaked in 10% bleach.b. Wipe with a damp cloth.