My iPhone 6s is having issues with its touchscreen, helppppp.

So recently my phone has been buggy with its touch sensitivity around the start of 2020 for my iPhone 6s. I don’t know exactly why it was happening, but the problem would go away after I either turned off the phone or powered down. However, it keeps popping up randomly at moments. I think I know why. I usually drop my phone a lot in the bathroom with a hard floor. I think the many falls may have caused internal damage and messed up the touch sensors to the point where the phone would either have a hard time reacting to my touch or would react on its own when I'm not even touching the phone. The reason why I believe is this because it has gotten more apparent after I drop it more and more. One time, it accidentally flew out of my hands and hit the lower part of my wall when I was walking. After the hit, the phone started to bug with my touchscreen immediately after the impact. I powered down and turned it on again and it went back to normal. It’s not a huge issue but I want a solution to permanently get rid of this problem so that it doesn’t pop up again. I don’t wanna have to repair it, so I would like the easiest solution if possible. Thanks.