Many moons ago, I bought a new cheapo Tasco 4x from retailer in the States. Sighted it in and took it on a week long deer hunt away from home and away from my spare rifles.
Here's how it went ......
Day 1 ...... Down pour rain event all day.
Day 2 ...... Scope totally fogged and useless.

Day 3 ...... Borrowed shotgun with slugs. <barf>

Day 4,5,6 . No shootum deer. Skunked!
Retailer refunded price of scope, but I had to eat shipping both ways and toasted my holiday deer hunt.
Lesson learned ......
Cheap scopes are not cheap. I now buy used scopes of known quality. Leupold, Weaver, B&L.