Why are there suds left in my washing machine?

Excessive suds left in a washing machine after a cycle can be caused by using too much detergent, hard water, overloading the machine, using the wrong type of detergent, or a malfunctioning washing machine. To fix the problem, try using less detergent, using a water softener, reducing the amount of laundry you put in the machine, using the right type of detergent, or having the machine serviced or repaired. If none of these solutions work, consulting a professional for further assistance may be necessary.