Excessive suds in the drum can cause the washing machine to add more time to the wash cycle, preventing clothes from getting properly cleaned. Modern washing machines have sensors that detect excess suds and add more rinses to remove them, but this feature uses more water than necessary. To prevent this issue, be sure to use the proper amount of detergent for the load size and fabric type, and consider switching to a low-sudsing detergent if excessive suds continue to be a problem.