Possible Clues:

• Brand of scouring powder
• Cleanser brand
• Comet competitor
• Cleanser brand that 'hasn't scratched yet'
• Comet relative
• B(r)est friend?
• Cleaner brand with the slogan 'Hasn't scratched yet!'
• Longtime cleanser brand
• 'Hasn't scratched yet!' product
• ''America's Original Natural Home Cleaner''