U-Scan's surface is designed to be rinsed with each toilet flush, keeping it relatively clean every day.  If necessary, you can clean the surface of the device with a mild soap and pat dry with a soft cloth or paper towel.  

U-Scan will also perform an automatic daily purge to keep the interior of the device clean.

Warnings: 

• If your toilet's design prevents the U-Scan from being rinsed with the water from the toilet's flush, it is recommended to rinse the surface of the device with a cup of water on a regular basis.
• Please only use mild soap and water to clean the surface of the U-Scan. Do not apply any other cleaning products, as they may affect the U-Scan's lifespan and accuracy.
• Do not use any toilet cleaner/deodorizer blocks in your toilet while U-Scan is installed, as it can lead to measurement contamination as well as discoloration of the U-Scan.
• Do not use toilet paper to dry off the U-Scan after cleaning. Toilet paper may clog the collection point of the device, leading to measurement failure.
• Please remove the U-Scan before cleaning your toilet. Bathroom and toilet bowl cleaning solutions often contain abrasive chemicals that can damage U-Scan.