You do not need to throw away your brushes if you carefully wash them. Using hot, soapy water soak them for a few minutes. Make sure you swish them around so all the bristles get completely covered. Rinse them well in warm water. Pour some alcohol in a small bowl, again swish the brushes around in the alcohol. Once again rinse them really well under warm water. You do not want them to loose there shape. Shake the excess water out of the bristles, if you need to, wipe them back and forth over a paper towel. Let them finish drying by standing them up in a glass. If they have lost their shape a bit, try to re-shape them while they are still a little damp.