The plastic top of the glass pot on two coffee makers drip.

This is a design flaw and can be corrected by enlarging the lid spout. First remove the plastic lid. Then use a fine grinder or sandpaper to remove approximately 1/8 inch of plastic from the lid spout. Follow the exact same contour of the oval spout. However, do not take off so much material that you disturb the small plastic tabs that hold the lid to the pot. Finish by slightly rounding the edges where the material was removed with fine sandpaper. No leaks - no drips.