Hello,
Can you provide more info? The following steps may help:
Check your touchscreen
Make sure that your hands are clean and dry, then try these steps:
- If you have a case or screen protector on your device, try removing it.
- Clean the screen with a soft, slightly damp, lint-free cloth.
- Unplug your device.
- Restart your device. If you can't restart it, you can force restart your device.
If your touchscreen still doesn't respond like it should, contact Apple Support or take your device to an Apple Retail Store or Apple Authorized Service Provider.
From:
If the screen on your iPhone, iPad, or iPod touch doesn't respond to touch - Apple Support