1, we need to prepare the tools needed for disassembly, usually a cross screwdriver, a flat screwdriver and needle-nosed pliers. "If a worker wants to do a good job, he must sharpen his tools first", as shown in the figure.

2. Choose the right tool.

3. After that, we aim the screwdriver at the screw and fully engage the head with the opening of the screw. Don't twist it if it is not fully engaged, it is easy to slide the thread, as shown in the figure.

4. If the screw slips, we need to keep the screwdriver vertical and press it down hard to ensure that the machine will not be damaged and turn it slowly. In general, the screw can be unscrewed in this way, as shown in the figure.