We need to replace Honda Brio AC filter in 20.000 kms, but between replacing time, you can clean the filter to ensure its ability to filter dusty air.
You can do the cleaning with minimal effort and less than 20 minute.
Step 1: You need to access air filter box behind the glove box. Push toward the glove box side marked by red arrow.
Now you can see the filter box cover, you need to open it.
Step 2: Push the clip and then pull the filter box cover.
Step 3: Gently pull the filter.
Step 4: You can see how dusty the air filter is, and compressed air can do nicely to blow them out.
Step 5: Reinstall the clear AC filter, and make sure the arrow mark facing downwards.
Step 6: Reinstall filter box cover and glove box.