Yes, new LPs do need cleaning. This helps remove any residual mold release agent, any bits of paper or card present if they were sleeved in paper (as many still unfortunately are) and overall give you a nice clean disc to start with -- of course they should then go in brand new inner sleeves as well.
I'm not convinced you need a 45min regimen however, but everyone has their own recipe!
I'm not convinced you need a 45min regimen however, but everyone has their own recipe!