We are adding a few additions to our pool slab (please disregard the mess and tree stump lol) and was wondering what you guys thought would be the best way to clean out this surface drain? If I had to guess, it's about 20ft across and about 1.5" wide and 3-4" in depth. The drain holes are too small to really get a hose or pressure washer to be useful. There was a lot of landscaping before (previous homeowners were not so bright) that caused a lot of dirt to get inside and weeds tend to grow often in it now. What would be the easiest way to clean it out?