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When cleaning an advertising engraving machine, the following points should be noted:

1. Turn off the power and water sources to ensure that the machine is in a safe state.

2. Use a soft cloth or sponge for cleaning, avoid using hard brushes or metal to prevent scratching the surface of the machine.

3. When cleaning, avoid letting water enter the interior of the machine to avoid affecting its normal operation.

4. After cleaning, dry the surface and interior of the machine to avoid water stains and moisture affecting its performance.

5. Regularly perform deep cleaning, including cleaning the rollers, guide rails, bearings, and other parts of the machine to maintain normal operation.