You may need to add more oil, say a generous tablespoon. Also, I don't think you should need to soak those lentils first, the pressure cooker should be more than able to take them apart without any advance soak.

You may need to add more oil, say a generous tablespoon. Also, I don't think you should need to soak those lentils first, the pressure cooker should be more than able to take them apart without any advance soak. Also be sure to use plenty of water. At least 8 cups for 1 pound of beans.