Pam & Jim, an L-shaped pool is one of the hardest for any auto pool cleaner to work in. If you want to, with only dust and dirt in your pool, you might consider the original "Pool Sweep." It is a booster-pump (pressure) style cleaner. It is still listed as available on the Pentair web-site, www.pentairpool.com. When they were made by Arneson, an over-the-deck kit was available, Pentair may also have one. It would probably have to ordered, but is a great cleaner (though now considered "old-fashioned").