There is an option in the script Tweaks/context menu :
"Add Clear System Temp" in Recycle Bin Context Menu (Not in desktop)
with the command line
Cmd.exe /c %SystemDrive% && cd %SystemRoot%\Temp\ && del *.* /f /q && (for /d %%a in (*) do rd "%%a" /q /s) && cd %temp% && del *.* /f /q && (for /d %%a in (*) do rd "%%a" /q /s)