Although a bagging lawnmower is a handy piece of equipment to get, a sticky or malfunctioning zipper can make emptying the bag hard. That is when mowing suddenly becomes more of a pain than a pleasure. Over time, dust and other debris may accumulate in the teeth of the zipper, and exposure to the elements may cause the zipper to stick. Instead of replacing the bagger, you may simply take care of the zipper in a way that returns it to full functionality.
Scrub the teeth of the zipper aggressively using a scrub brush to remove dirt and other debris. Brush the zipper from the two of its sides and in the two directions to remove particles inside and outside the bag. Shake out the bag to disperse all of remaining grit.
Spritz the teeth of the zipper lightly with a spray-on penetrating oil which also includes lubricant and water repellant. In addition to allowing the pull tab of the zipper to move freely, the application will safeguard the teeth of the zipper from moisture and protect against corrosion of metal parts.
Wipe all excess penetrating oil from the teeth of the zipper with a paper towel. Surplus oil on the zipper may transfer to your hands, making them slippery and cause unsafe operating conditions when you use the mower.
Repeat these jobs at the first symptom of a sticky zipper on the lawnmower bagger.