Just take the scope back for a refund or toss it. I know of a Simmons scope that is made by meade labs. It holds zero, it is completely fog proof, you can set the dials to zero. It only costs $60 until midway runs out. Walmart has the same scope priced at $120. http://www.midwayusa.com/product/510964/simmons-master-series-prohunter-rifle-scope-3-9x-40mm-truplex-reticle-matte
Edit: Midway has increased the price to $81. Walmart has the same scope now for $75. But in the Walmart product description it does not say the scope is waterproof or fogproof. Walmart does not write product descriptions. If it was the same scope as midway the product description would say it's waterproof and fogproof. Simmons wouldn't leave out the most desirable features of the scope unless they are not there.
I have noticed that many items at walmart don't have the same accessories as other places. I bought a knife from midway. Both midway and walmart had the exact same price on the knife. But at walmart you got a nylon sheath that is as durable as a sock. At midway the knife included a nice sturdy leather sheath. You have to pay attention to details when dealing with wally world. If I had bought the knife at walmart I would be out another $15 plus shipping to get a custom sheath made.