My iPhone 5c keeps spazzing out after a brand new digitizer?

I just replaced the digitizer on my iPhone 5c and if I touch the screen it keeps spazzing out like some one is touching all over the screen… I got it off eBay for like 40 bucks and it doesn't do it every second but like every 10 minutes and I can't deal with it! And there's no way I wanna pay 200$ for a new phone… Any ideahs on what it is or how to fix it? And it stops when I lock the phone and unlock it

If it's on a plan take it to them if you all ready haven't is my best bet or somewhere that fixes and replaces electronics.

Switch to a android like a galaxy

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