Low Harp Buzzing

When playing a low draw note on a low-tuned harp... 1 draw on a Low D Harmonica for example... do you sometimes get a rattle? This is caused by playing to loudly... the reed is swinging too far and hitting the cover plate.

Answer?

1) Play softer... of course! ;-)

2) Placing a piece of tape (electrical tape is awesome, but it's very thick) inside the cover plate (yes, you have to take the cover plate off) where the offending reed is hitting. This will stop the metal-to-metal contact that creates the buzz.