Dear Customer,
Thank you for contacting Bitspower.
The water block comes with a one-year warranty.
Since it has been in use for over a year, the warranty has expired.
You can open the water block for a deep clean.
Just ensure there are no leaks after reassembling it.
If you want to exchange the O-rings, you can buy them from us.
Here is our email address.
shopservice@bitspower.com.tw