Turn off the general switch, find the red and blue dot, and use the hand to reveal a small hole.

Second, use a flashlight to observe the hole, see whether the fixing screw inside is a cross or a mouth, and loosen it with the corresponding screwdriver. Several brands of this screw are inner square holes, if no tool is available, please be careful not to damage the screw using other removable alternative tools.

Third, after loosening the screw, you can remove the handle.

Four, at this time, what you see is a large copper nut, remove the nut with a big wrench, you can remove the spool of the faucet.

Fifth, observe whether the spool under the copper core plane is smooth or without fine sand, and clean.

Remove the rubber seal on the faucet and see if there is any breakage. Generally speaking, the whole hot and cold faucet is very good, and the use of high reliability.

If you often can not find obvious problems after opening, at this time, it is to replace the spool.