Play Softer
Most harmonica players play too loudly. This causes excessive wear on the harmonica, decreases dynamic range during performance and often causes tonal issues (airy tone... slightly out of tune...).
Here's a fix...
Play a jam track on your stereo system. Set the volume very low, where you need to lean in a bit to hear.
Turn your amp on and set the volume higher than you normally do.
Now jam along!
This forces you to play quietly... otherwise you can't hear the music. This also forces you to phrase... to leave enough space between your licks to be able to track where you're at in the music. Playing all of your bends softly forces you to focus on technique and not force to get a bend to happen. This is a great exercise on MANY fronts.