The answer to 'how to clean supply line' is to regularly clean and maintain the supply lines that bring water to your fixtures. This helps prevent clogs, leaks, and water pressure issues.
To clean supply lines, first turn off the water supply to the affected fixture. Then, use a plumber's snake or flexible auger to gently push through the supply line and clear any built-up debris or mineral deposits. Avoid using harsh chemicals, as they can damage the pipes. You may also need to disassemble the supply line connections to fully clean the interior. Be sure to check for any cracks or damage while the line is disassembled.