this tip is found in First magazine, August 2005 issue.
get clothes even cleaner!
"if your clothing isn't emerging from the washer as spotless and as bright as it used to, it's likely due to the accumulation of soap scum in the washer hoses. to dissolve, simply add one cup of white vinegar to an empty machine and run a small load cycle using the hot water setting. the acetic acid in vinegar dissolves clog causing buildup, so the washing machine runs more smoothly and clothes come out their absolute spiffiest."