Insert the degaussing unit's power plug into an electrical outlet, hold the degaussing unit, and position its demagnetizing surface close to the cathode ray tube's fluorescent screen, ensuring it is parallel to the screen's plane (i.e., the degaussing unit's body is perpendicular to the screen's plane). Then, press the degaussing unit's power switch to initiate the process. Starting from a point on the outer edge of the fluorescent screen, move the degaussing unit in a spiral pattern towards the center of the screen. Once at the center, slowly move away from the screen along the vertical axis of the screen's plane, approximately to a distance of 1 meter. At this point, release the degaussing unit's power switch to disconnect the power. The demagnetization process is now complete.

Due to the lower inductance of the degaussing coil, a larger excitation current is required during operation, which causes the degaussing unit to heat up easily. Therefore, the degaussing process should not exceed 30 seconds at a time. Generally, color spots can be eliminated by a single degaussing cycle unless caused by issues with the cathode-ray tube deflection coil, the color purity adjustment ring, or external magnetic strips. If the spots are not completely removed in one attempt, repeat the degaussing process 2 to 3 times as described, until the color returns to normal. However, note that you should wait a few minutes after completing one degaussing cycle before proceeding to the next, as continuous operation of the degaussing unit may damage it.

Demagnetization of the cathode ray tube can be performed while the television is in operation, or when it is not in use, though the latter is recommended.

Additionally, when demagnetizing a cathode ray tube, after pressing the demagnetizer's power switch once, follow the aforementioned method until demagnetization is complete. Remove the demagnetizer from about 1 meter away from the fluorescent screen before releasing the power switch. Do not randomly turn the demagnetizer's power on and off during the demagnetization process. This not only fails to demagnetize but may also magnetize it, leading to other color-related issues.