When cleaning these sinks, however, it is important that you follow the company’s simple guidelines to keep from damaging the sinks. Cleaning a Thermocast sink with methods or materials that are not recommended by the manufacturer can also void its warranty.
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Put on rubber gloves. Spray the sink with a nonabrasive commercial kitchen cleaner, covering all surfaces of the sink with the spray.
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Dampen a sponge in warm water. Wipe the sponge over the sink, scrubbing at any visible dirt.
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Rinse the sink with warm water and then dry it with a clean towel.
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Fill the sink with warm water and add 1 tsp. of chlorine bleach per gallon of water, once a month. This will sanitize the sink, and is recommended by Thermocast. Let the bleach-water mixture remain in the sink for 15 minutes, then drain the sink. Rinse.
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Apply liquid automotive polish to a clean, soft cloth. Wipe the cloth over the sink to remove any scratches that may have occurred. Buff the sink using a circular motion. Rinse.