How do you keep ice from forming in your refrigerator?

TRY TURNING DOWN THE TEMP GAUGE BY A 1/2 POINT AT A TIME TO FIND THE RIGHT EX. 5 TO 4 1/2...IF ITS UNDER WARRANTY GET A NEW ONE. IF NOT HAVE A TECH COME LOOK AT IT. THERE ARE SOME COMPANIES THAT OFFER A WHOLE HOUSE APPLIANE PACKAGE. LOOK IN THE YELLOW PAGES.