Three cast iron pans with blue sponges
Stop Using Hot Water To Wash Greasy Pans
Washing a greasy pan in hot water can melt the grease, which can solidify in your pipes and lead to blockages that can even affect city sewers and wastewater treatment plants.
Meanwhile, cold water solidifies grease, so chunks of oil and fat can travel through and out of pipes. This keeps your pan in good condition and prevents a big plumbing bill.
First, let the pan cool completely so you aren't handling hot grease. Once cooled, get rid of accumulated fats, oils, and grease (FOG) by scraping it off into the trash.
After wiping out the pan well using paper towels or newspaper, wash it in the sink using cold water and dish soap. Tougher residues may require some baking soda.