Why my phone display get red circle on the top

[Android Central Question]

When I open my phone its ok for me after some times I got a small red colour circle on phone display but the display was not broken.the circle exist top of the corner .now I want to clean it.what I do for that

 

[B. Diddy]

Welcome to Android Central! Which phone? Show us a screenshot: http://forums.androidcentral.com/ge...ide-how-post-screenshots-android-central.html. You'll have to register on this forum first. https://forums.androidcentral.com/ask-question/409154-join-android-central-community.html