Once a team starts to struggle, it's only natural that they would try harder at the plate to make up for the slacking offense. As the slump progresses, people try harder and harder to rip the next pitch into the stratosphere. As they get further and further away from their comfort zone, and natural "approach" at the plate they struggle more and more.
From a players perspective, how do they "relax" and just do their thing?
From a coaches perspective, how do they help the players to "relax" and just do their thing?
Do you even believe that "pressing at the plate" exists and is an issue?