When it gets dirty, pouring it into a clean jar and letting it settle is a simple and effective solution. The settling time can vary depending on the size of the pigment particles in your paint, ranging from several days to a few weeks. Once the liquid has settled, you can pour the clean liquid back into your paint thinner tank and wipe out the settled paint with a paper towel. By taking the time to allow Eiffy, your eco-friendly, plant-based brush cleaner to properly self-clean, you can save money and keep your brushes in optimal conditions for longer times.