Shure SE535 Manual De Instrucciones página 10

Cleaning the Earphone Nozzle
If you notice a change in sound quality, remove the sleeve and check the nozzle
of your earphone. If nozzle is blocked, clear obstruction by
using wire loop end of cleaning tool.
Cleaning
Caution: When cleaning, do not force any object through the earphone nozzle!
This will damage the earphone sound filter.
Warning: The cleaning tool is only to be used to clean the earphones.
Any other use, such as using the tool to clean ears, could result in injury.
Tool
Wire Loop