[Q] UNROOT LG G2 (Verizon) topic

How do I unroot LG G2 w/ Verizon? Tried flashing - failed (upgrade stopped due to error). Tried SUPERSU remover/delete su in binaries - failed (still says rooted in about)

What is the quickest/fastest/easiest way to unroot LG G2 with Verizon? PLEASE help ASAP!