What is causing my ball joints to wear out every year?

I ve replaced them twice in 2 years, the 1 of them again in less than a year. Less than a year since then they re both making noise again.

Other answer:

metal_taskmaster:
What kind of vehicle? You buying cheap crap on line or getting MOOG ball joints with grease fittings that you can lube?
Nomadd:
Improper installation.
Chris:
Mechanics can find out things like that, if you ask them to.
don r:
They must be clean and lubricated and they will last for many years.