One of my customers has about 15 trees that over the winter took a major beating from ice, snow and wind. The trees dropped millions of twigs and bunches of larger sticks. I have removed most of the large branches and sticks but I need to get all those twigs up. His lawn is about an acre total and it is way to large to rake and I have tried to vacuum it up. It ain't working. Do any of you have a suggestion? Please help! Thanks.