Logitech MX Master 3 pairing problem solving

Flip the mouse's power switch into the OFF position, unplug any cables, and flip it over so the feet are facing up.

Heat an iOpener and apply it to each of the mouse feet for about one minute each.

Slide an opening pick under an edge of the left mouse foot.

Slide your pick under the foot to separate its adhesive until you can grab it with your fingers.

Peel up and remove the left mouse foot.

Repeat the previous two steps to remove the right and the rear mouse feet.

Slide the flat end of a spudger under an edge of the adhesive. If the adhesive seems stuck, you may need to heat the adhesive further.

Use a pair of tweezers or a spudger to remove any large chunks of leftover adhesive.

Thoroughly clean the bottom of the mouse with isopropyl alcohol and a lint-free of microfiber cloth. Allow the surface to dry completely.

Peel your new mouse feet away from their adhesive liners and press them firmly into place.

Use a Phillips screwdriver to remove the five 4.3 mm-long screws securing the lower half of the lower case.

Use a T5 Torx driver to remove the one 4.2 mm‑long screw securing the upper half of the lower case.

Insert your opening pick into the seam between the thumb rest and the lower case.

Slide your pick right, towards the rear of the upper shell and pry upward to release the left clips.

Gently pry the upper shell and lower case apart to release the clips on the right side of the mouse.

Lay your mouse down onto your work surface, making sure none of the clips re-engage.

Grasp the upper shell and partially lift up the right edge.

Pull the upper shell up and back to release the final clip and separate the upper shell from the lower case.

Use the flat end of a spudger to gently lift up the black sliding lock on the interconnect cable socket.

Slide the cable straight out of its socket on the motherboard.

Remove the upper shell from the lower case.

Put only the lower part of the mouse on and test its pairing reliability. If it works fine, the lower part is functioning correctly.

Connect the upper part of the mouse using the flat flexible cable only, then retest to see if the pairing issue reappears.

Clean the first end of the flat flexible cable and test if the pairing problem disappears. If the issue is resolved, reassemble your mouse and enjoy a reliable connection. If not, proceed to clean the next end of the cable in sequence until the problem is fixed.

Use a gauze pad dipped in an electrical cleaning solution to clean the ends of the flat flexible cable (FFC).