I've been having problems with my Philips VCR and the responses to my last post here advised that cleaning was best done my removing the top and cleaning myself. If I do that and clean the heads with a Qtip do I need a special cleaning substance? Also do I clean all the heads I see or do I need to work out the recording heads? The VCR is a SVHS and doesn't seem to be recording properly so I'm guessing a head cleaning couldn't hurt. TIA.