You may try the following to help remove the ghost touches: - Wipe cache partition - Dial *#2663# (to update SP FW) - Toggle "Touch Sensitivity" on and/or off
If you have a newly-placed tempered glass on your screen or if you had a software update recently installed, these could be factors too.
To gauge whether the issue is hardware or software-related: - if the issues started after a software update, there's a huge possibility that the issue is software-related (hence, future patches may be able to fix it. You can expedite by sending error reports in this app). - try to enter Safe Mode (and/or a factory reset, if possible). If the ghost touches persist even in Safe Mode (or after a factory reset), the issue may be already at hardware level.
You may also do some screen touch tests/diagnostics to check if a part of your screen is no longer working/responding to touches (especially around the area where the ghost touch happens). If this is the case, then the issue may be caused by hardware malfunctions. One way to find the exact area where the ghost touch occurs (if not yet determined as of now) is to do a screen recording and turning on "Show taps and touches." If a screen recording is not possible, you may try to download a reputable touch test app.
You may also consider visiting an authorized Samsung service center to be sure. If the problem has been found to be at hardware level, then replacing the actual screen is needed.
