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Related Clues:
- Solution in soap and frosted glass
- Laundry additive
- Sodium hydroxide solution
- Caustic potash, e.g.
- Drain unclogger
- 'Fight Club' agent
- Caustic application
- It's used in soap-making
- Potassium hydroxide, e.g.
- Drain cleaner component
- Caustic potash
- NaOH, familiarly
- Wood ash product
- Drain opener
- Wash (out)