If you have aftermarket boot like most w/ polly boots they are not made right and won't seal same way as OE or Boots came w/ Moog etc joints.
"Factory" and other "rubber" boots have a hidden metal ring in the base end that hold on the outer joint.
Moog and maybe others also have extra vent area on stud end so can't wreck them w/ grease.
For OE and others w/o "Moog vent boots," I made a tool to vent them.
small wire or "geek tool" w/ tip bent 90° push into stud opening is often enough to vent grease to prevent tearing them.
(if using screwdriver, heat to bend or most will break.)
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
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