What is the best way to completely remove a WSP from SharePoint? SO when you reinstall it again from scatch it thinks it is a clean install?
We can either manually do it through central admin or by using powershell commands.
I would prefer doing this through powershell
To uninstall and remove Farm solutions use the Uninstall-SPSolution and Remove-SPSolution cmdlets (Use -WebApplication attribute if the solution has webapplication-scoped resources):
To uninstall and remove Sandbox solutions use the Uninstall-SPUserSolution and Remove-SPUserSolution cmdlets: