When you cleaned the lint screen, you should have washed it with water and soft-bristle brush to remove all dryer sheet residue. If you didn't do that, then the lint screen may still be clogged even though it looks clear. If you haven't already washed the lint screen with water, do that and let it dry completely. If the dryer still displays the CE code, then a bad inlet or outlet thermistor (temperature sensor) could be causing the CE code. You can unplug the dryer and check thermistor resistances from the electronic control board. The inlet thermistor connects to the control board through light blue and brown wires on the J12 plug. The outlet thermistor connects through the same plug with purple and tan wires. Pull the J12 connector and measure resistance through the inlet and outlet thermistor. Your meter should measure around 50 k-ohms through the inlet thermistor circuit and 5 k-ohms through the outlet thermistor circuit at room temperature. Replace a thermistor if its resistance is off my more than 10%. The inlet thermistor is located on the rear heater duct and the outlet thermistor is located on the blower fan housing. You can order parts here: searspartsdirect.com/model/403r4qogd6-000583/kenmore-elite-41781100003-dryer-parts
. Here's a link for the inlet thermistor: searspartsdirect.com/product/62gqnegtr0-0026-417/id-134711200
. Here's the outlet thermistor: searspartsdirect.com/product/565408avn3-0026-417/id-134711300
. Unplug the dryer before replacing parts. I hope this information helps. Let me know if you need more assistance.