Lawn sweepers operate with brushes underneath that pick up lawn debris and flip it into a hopper. You may use a lawn sweeper to clean the yard after mowing it, or to clean fallen leaves and debris. An accumulation of dead grass and leaves on your lawn blocks sunlight and air from the grass and can kill the lawn.Click to see full answer. Keeping this in view, do lawn sweepers actually work?Yes they do work. I don’t usually use them for leaves as I have mulching blades. I do however use the sweeper for my lawn when I have to much grass from being damp & I let the kids go over the lawn in the fall after doing the leaves. The sweeper works well for the uses that I have done.Additionally, can you use a lawn sweeper while mowing? The only way you could use it while mowing is if you have a rear discharge deck. It will pick up leaves very well. You can adjust the height of the sweeper to sweep close to the dirt or higher your choose. Beside this, what do lawn sweepers do? A lawn sweeper, also known as a leaf sweeper, is a garden tool for the mechanical removal of debris, such as fallen leaves, pine needles, twigs, grass clippings or litter, from a lawn or paved area.Will a lawn sweeper pick up wet leaves?Its also great if you let the lawn go too long, then mow but instead of leaving piles of clippings, you can just pick them up with the sweeper. Regarding wet leaves It picks up most of them. the smaller the collection the better, so it pays to do it frequently.