Secondly, keep your cutters clean. Resin soon builds up around the cutting edges and reduces the clearance angles leading to overheating. You can buy proprietary cleaning kits, which include resin cleaner, but oven cleaner is an excellent alternative.
Use an old toothbrush to clear away the softened deposits, never scrape at them with a knife or you will damage the cutting edges. Really stubborn deposits can be removed carefully with very fine wire wool or a fine wire brush. Once they are clean again, apply a coating of dry spray lubricant to help reduce friction and minimise further resin build-up.