Why do i keep blowing turn signals?

mud, I agree with you 100%
Vibration is death. The grease didn’t fix your issue... Electrically speaking the grease only prevents water and corrosion from getting to it... that is it. It was where he pulled it out and put it back in....lol.
ANY PLUG / connection on your truck can have this issue. ***SLIGHTLY*** bend any prong one way to force it to make connection to the mating plug.
In those sockets I’m pretty sure they’re 3157 bulbs, push all 4 socket prongs to the center, and ever so slightly pull out those little wires away from the bulb.