To prevent your glasses from fogging up while wearing a mask, you can try the following tips:

1. Adjust the fit of your mask: Make sure that your mask fits snugly against your face, with no gaps around the edges. This will help to prevent your breath from escaping and fogging up your glasses.

2. Use a mask with a nose wire: Many masks have a wire or strip along the top edge that can be molded to fit the shape of your nose. This can help to create a tighter seal around your nose, reducing the amount of breath that escapes and fogging your glasses.

3. Use a mask with a filter pocket: Some masks have a pocket where you can insert a filter, such as a coffee filter or tissue. This can help to absorb moisture from your breath, reducing the amount of fog that collects on your glasses.

4. Apply a small amount of dish soap: Before wearing your mask, apply a small amount of dish soap to the lenses of your glasses. Rub it in and then rinse it off with water. This will create a thin, invisible layer on your lenses that will help to prevent fog from sticking to them.

5. Use anti-fog sprays and wipes: There are many commercial anti-fog sprays and wipes available that can be applied to the lenses of your glasses. These sprays and wipes create a protective layer that prevents moisture from adhering to your lenses, reducing fogging.

Anti-fog sprays usually contain a combination of surfactants, or wetting agents, and polymers, which are long chain molecules that form a protective layer on the surface of the lenses. When applied to the lenses, the wetting agents help to spread the spray evenly, while the polymers form a thin, invisible layer that prevents moisture from sticking to the lenses.

To use anti-fog spray, simply spray a small amount onto the lenses of your glasses and rub it in with your fingers. Let the spray dry for a few minutes, and then wipe off any excess with a clean, dry cloth. The protective layer will remain on your lenses, helping to prevent fog from sticking to them.

Anti-fog spray works by creating a protective layer on the lenses of your glasses that prevents moisture from adhering to them. This layer repels water and moisture, making it difficult for fog to stick to your lenses, and helps to keep your glasses clear and fog-free.

By following these tips, you can help to prevent your glasses from fogging up while wearing a mask. Always make sure to adjust the fit of your mask and use a mask with a nose wire or filter pocket to create a tight seal and reduce the amount of breath that escapes. Applying dish soap or using anti-fog spray can also help to prevent fog from sticking to your lenses.