To use a red household hair clipper, follow these steps:

1. Before you begin, make sure the clipper is fully charged or plugged in and the blades are clean and oiled.

2. Choose the appropriate guard or blade for the desired length of hair you want to cut.

3. Turn on the clipper and hold it at a 90-degree angle to the scalp.
   

4. Starting at the nape of the neck, move the clipper in an upward motion against the direction of hair growth.

5. Continue to work in sections, moving from the back of the head to the sides and top, using the appropriate guard or blade to achieve the desired length.

6. Use the clipper to trim around the ears and neckline.

7. Once you have finished cutting the hair, turn off the clipper and clean the blades with a brush to remove any hair or debris.

8. Finally, apply a few drops of clipper oil to the blades to keep them lubricated and prevent rusting.

Remember to always use caution when using a hair clipper and follow the manufacturer's instructions carefully. If you are unsure about how to use the clipper, consider seeking advice from a professional hair stylist or barber.