How can I safely and effectively clean my paintbrushes using a mixture of linseed oil and mineral spirits?

To safely and effectively clean paintbrushes using a mixture of linseed oil and mineral spirits, follow these steps:

1. Fill a container with a mixture of linseed oil and mineral spirits in equal parts.
2. Swirl the paintbrush in the mixture to loosen the paint.
3. Use a rag or paper towel to wipe off the excess paint.
4. Repeat the swirling and wiping process until the brush is clean.
5. Rinse the brush with soap and water to remove any remaining residue.
6. Allow the brush to dry completely before storing it.