How to clean the air filter of an NE router?

The air filter can be directly removed for cleaning. It is recommended that the air filter be cleaned once every three months.

The specific procedure is as follows:
1. Press the lock switches on both sides and remove the air filter.
2. Remove the sponge part from the air filter for cleaning. You can use either water or a vacuum cleaner to clean it.
3. Install the clean sponge in its original position.