I previously emailed TS about the e-ink side getting warm (the top half when the reader is on the left) and they replied that it's normal. But I'm not sure what range of temperature is considered normal and I haven't followed up to ask. If you have access to an infrared thermometer, you may try taking the temperature of your eDGe to see how hot is hot and give a feedback to the TS people. Unfortunately, my eDGe is still with the RMA people so I can't try this out myself. But I'm quite sure it did not get hot enough to melt the glue off the rubber strip.