I have a Super Sniper 10x42 riflescope, and I have a problem with the turrets. In cold days, the turrets starts stiff, and some times, it slips the first clicks, and I have to rezero it. How can solve the inconvenient? I have this scope since 2008, and its MOA turrets MIL-DOT reticle. Thanks in advance for the recomendations.