T.V. TILING RECEPTION ISSUES (Wasena neighborhood/ Roanoke, Va)

Two Cox technicians came by yesterday. (This is the 4th time Cox has sent technicians to my home in an attempt to repair the tv tiling reception problem.) The 4th Cox visit entailed changing out the main splitter and checking the lines outside. They removed another splitter from the back of our tv box and checked the reception number readouts. When they left, all fingers were crossed that the problem had been resolved.....unfortunately, 3 hours later TILING RECEPTION ISSUES STARTED AGAIN! I'm not sure Cox knows how to resolve this problem! :(