If you are experiencing issues with stubborn stains not coming off the floor after the robot mops, please try the following recommendations to improve the robot's mopping performance.

1. Increase Water Volume and Frequency of Mop Cleaning

To effectively tackle stubborn stains, it is recommended that the robot dispenses a larger amount of water while mopping, and this setting can be configured in the app. Additionally, increasing the frequency of mop cleaning can further ensure that the cleaning performance of the mop remains effective throughout the robot's mopping process.

2. Use eufy Cleaning Solution

Use only eufy cleaning solution with your Omni C20 to achieve optimal mopping results. Make sure to mix the cleaning solution with water at a ratio of 1:200.

3. Utilize the "Zone Cleaning" Feature and Increase Mopping Frequency

Consider using the "Zone Cleaning" feature and increasing the robot's mopping frequency when targeting specific areas that require more attention.