Important handling information for iPod touch
Cleaning Clean iPod touch immediately if it comes in contact with anything that may cause stains, or other damage—for example, dirt or sand, ink, makeup, soap, detergent, acids or acidic foods, or lotions. To clean:
Disconnect all cables and turn off iPod touch by pressing and holding the Sleep/Wake button, then dragging the slider.
Use a soft, slightly damp, lint-free cloth—for example, a lens cloth.
Avoid getting moisture in openings.
Don’t use cleaning products or compressed air.
The front of iPod touch is made of glass with a fingerprint-resistant oleophobic (oil-repellant) coating. This coating wears over time with normal usage. Cleaning products and abrasive materials will further diminish the coating and may scratch the glass.
Using connectors, ports, and buttons Never force a connector into a port or apply excessive pressure to a button, because this may cause damage that is not covered under the warranty. If the connector and port don’t join with reasonable ease, they probably don’t match. Check for obstructions and make sure that the connector matches the port and that you have positioned the connector correctly in relation to the port.
Lightning to USB Cable Discoloration of the Lightning connector after regular use is normal. Dirt, debris, and exposure to moisture may cause discoloration. If your Lightning cable or connector becomes warm during use or iPod touch won’t charge or sync, disconnect it from your computer or power adapter and clean the Lightning connector with a soft, dry, lint-free cloth. Do not use liquids or cleaning products when cleaning the Lightning connector.
Certain usage patterns can contribute to the fraying or breaking of cables. The Lightning to USB Cable, like any other metal wire or cable, is subject to becoming weak or brittle if repeatedly bent in the same spot. Aim for gentle curves instead of angles in the cable. Regularly inspect the cable and connector for any kinks, breaks, bends, or other damage. Should you find any such damage, discontinue use of the Lightning to USB Cable.
Operating temperature iPod touch is designed to work in ambient temperatures between 32° and 95° F (0° and 35° C) and stored in temperatures between -4° and 113° F (-20° and 45° C). iPod touch can be damaged and battery life shortened if stored or operated outside of these temperature ranges. Avoid exposing iPod touch to dramatic changes in temperature or humidity. When you’re using iPod touch or charging the battery, it is normal for iPod touch to get warm.
If the interior temperature of iPod touch exceeds normal operating temperatures (for example, in a hot car or in direct sunlight for extended periods of time), you may experience the following as it attempts to regulate its temperature:
iPod touch stops charging.
The screen dims.
A temperature warning screen appears.
Some apps may close.
Important: You may not be able to use iPod touch while the temperature warning screen is displayed. If iPod touch can’t regulate its internal temperature, it goes into deep sleep mode until it cools. Move iPod touch to a cooler location out of direct sunlight and wait a few minutes before trying to use iPod touch again.
See the Apple Support article Keeping iPhone, iPad, and iPod touch within acceptable operating temperatures.