Aukey EP-T10 left earbud suddenly a lot quieter

I got the earbuds in june 2020 and they worked really well, untill a vew days ago!
The left earbud suddenly startet to be a lot quieter and the right earbud was a lot louder.
I tried to fix it in my phonesettings (Samsung Galaxy S9 plus) but with no success.
Is there anything I can do to resync/make them the same volume again??
Thanks in advance

Hi @Rosa
Please try to clean the earphones to see if any foreign objects are blocked.
Please try to pair another device.
If there is no improvement, please contact our service team at support@aukey.com.