Open windows and doors to ventilate the house
Turn on exhaust fans in kitchen and bathrooms
Remove the fish source and take out trash immediately
Wash dishes, pans, cutting boards, and utensils with hot soapy water
Clean countertops, sinks, stovetop, and nearby surfaces
Mop floors with hot water and a deodorizing cleaner
Boil vinegar or simmer lemon water to help neutralize odors
Place bowls of baking soda around affected rooms
Set out activated charcoal to absorb lingering smells
Run the dishwasher with a cleaning cycle if needed
Wash kitchen towels, rags, and table linens
Clean the garbage disposal with ice, lemon, and baking soda
Replace or clean HVAC filters
Use an air purifier with a carbon filter
Wipe down walls, cabinet fronts, and appliance surfaces
Launder curtains, cushions, and fabric items that absorbed the smell
Check hidden spots like under appliances and behind trash cans
Repeat cleaning and ventilation until the odor is gone