Thank you for reaching out to us, and welcome to the community!
I'm sorry to hear about the issues you've been having with your QC20 headphones here, and would be happy to advise you further!
Whilst we cannot recommend that you attempt to reseal the earbuds for these headphones, we would be happy to offer you some service options regarding these!
In order to do so, can you please go to the below address, and get in contact with over the phone so we can give you the best options for this? To do so, you would need to select your country/region, scroll to the bottom, and select "Contact Us" to get this information.