A new study is taking the fight against microfibres in the Great Lakes back to the source: washing machines. The tiny particles of plastic are shed by synthetic fabrics like nylon and fleece when they're washed, slipping through water treatment plants and into the lakes. To stem the flow, researchers will install about 100 special filters on washing machines in Parry Sound, Ont. to see if they reduce the amount of plastic particles that show up at the town's water treatment plant.