Before I learned of Lana's Butt Stamping Method, specifically for the Just Jeans background stamp, I did this:
Place one drop of re-inker on background stamp. Using brayer, getting it really, really messy, cover the background stamp completely and evenly.
Place cardstock on worksurface. Stand up. Pick up background stamp and carefully position over cardstock and stamp. Continue to add pressure to surface area of stamp until your arms feel like they are going to fall off.
Lift stamp from cardstock carefully. Witness failure to cover center portion of stamped area.
Repeat. And again. And again. Place Just Jeans on shelf and vow to never use again.
Now, with Lana's method, I have successfully stamped the Just Jeans background stamp repetitively, without any problems or failures. And I'm happy to report I'll be using this stamp more frequently due to the success ratio.
And I don't get my brayer all messed up.