How to delete all files and folder with .bat file except the same .bat file

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Hello everybody,

I want to know how to create a .bat file to delete all files and folders older than 1 day. I created the next script, but I dont want to delete my .bat file, any suggestions?

@echo off
:: current folder
set dump_path="%CD%"

:: time
set max_days=1

:: remove all files
forfiles -p %dump_path% -m *.* -d -%max_days% -c "cmd  /c del /q @path"

:: remove all directories
forfiles -p %dump_path% -d -%max_days% -c "cmd /c IF @isdir == TRUE rd /S /Q @path"