If it only the digitizer that is cracked and not the LCD screen as well, I suggest that you replace the digitizer to resolve the problem.
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If it only the digitizer that is cracked, I suggest that you replace the digitizer (touchscreen) to resolve the problem.
Here is a link to the ifixit [guide|61263] guide which should be of some help.
Here is a link to [https://www.ebay.com/p/for-LG-Optimus-L90-D415n-Touch-Screen-Digitizer-Glass-Parts-Replacement-Black-US/1979977086|suppliers] of the part. It is not a recommendation to use them. It is shown to give an idea of the cost of the part. There are other suppliers online that may suit you better.
Hi @sheepbox15 ,
If it only the digitizer that is cracked and not the LCD screen as well, I suggest that you replace the digitizer to resolve the problem.
Here is a link to the ifixit [guide|61263] guide which should be of some help.
Here is a link to [https://www.ebay.com/p/for-LG-Optimus-L90-D415n-Touch-Screen-Digitizer-Glass-Parts-Replacement-Black-US/1979977086|suppliers] of the part. It is not a recommendation to use them. It is shown to give an idea of the cost of the part. There are other suppliers online that may suit you better.