why does my washing feel damp and soapy after a wash?

you have a problem with your house drain somewhere,i bet that the drain pipe from the machine is fitted to the drain pipe with a nozzle,it should be a vented pipe,
calgon wont help,its very good at removing scale,dont waste your power,or time doing maint wash,just put a cup of vinegar in machine,put it on a rinse programme,
hope this helps

gts
September 2010