If the Symphony is leaving too much water on the floor, be sure you are not holding the trigger down too long in one place. Also, if you're getting too much water on the floor and have it on the "HI" setting, change the setting to "LO."
Wash mop pads in wash machine with a mild detergent. DO NOT ADD fabric softner or bleach.
Check the filter/"dummy" filter for any cracks.
a. Remove filter
b. check to see if there are any cracks in the filter/"Dummy" filter on the sides or the top, and even the bottom as located in the photos below. Check the whole filter and look at the plastic mold lines for any cracks. They may be difficult to see, so be sure to inspect the filter in a well-lit area or room. If there are cracks in the filter, the filter will need to be replaced.