How to Reheat Fish in Microwave Without Smell

Why Does Reheated Fish Smell So Bad?

Fish contains trimethylamine oxide (TMAO), which breaks down into trimethylamine (TMA) — the compound responsible for that strong fishy odor. When fish is reheated, especially at high temperatures, TMA is released rapidly. The microwave's enclosed space concentrates the smell, making it even more noticeable. The good news: the right technique minimizes odor significantly.

How to Reheat Fish in the Microwave Without Smell

Step 1: Use a Tightly Sealed Container

Place the fish in a glass container with a tight-fitting lid. A sealed container traps the odor inside during reheating, preventing it from spreading through your kitchen or office. Open the container carefully after microwaving — away from your face.

👉 We recommend: M MCIRCO 10-Pack 22 Oz Glass Meal Prep Containers with Lids

Step 2: Add Lemon Juice or a Lemon Slice

Squeeze a little lemon juice over the fish before reheating, or place a lemon slice on top. The acidity neutralizes TMA molecules and significantly reduces fishy odor. This also brightens the flavor of the fish.

Step 3: Use Low Power (50%)

High heat accelerates TMA release. Set your microwave to 50% power to heat the fish gently. Lower power means less odor and better texture — fish overcooked in the microwave becomes rubbery and smells worse.

Step 4: Heat in Short Intervals

Microwave for 30–45 seconds at 50% power, then check. Fish reheats quickly — most portions are done in 1–1.5 minutes. Overheating is the biggest mistake people make with fish in the microwave.

Step 5: Ventilate After

Open a window or turn on the kitchen fan before opening the container. Even with the best technique, some odor is inevitable — ventilation keeps it from lingering.

How to Remove Fish Smell from the Microwave After

If your microwave smells after reheating fish, try these methods:

• Steam clean with vinegar: Fill a microwave-safe bowl with 1 cup water and 2 tablespoons white vinegar. Microwave on high for 3–5 minutes, then wipe down the interior.
• Lemon steam: Same method with lemon juice instead of vinegar.
• Baking soda: Leave an open box of baking soda inside the microwave overnight to absorb odors.
• Angry Mama steam cleaner: A fun and effective tool that uses vinegar and water to steam-clean your microwave in minutes.

👉 We recommend: HORNO Angry Mama Microwave Oven Steam Cleaner with Vinegar and Water

👉 Also helpful: Activated Charcoal Odor Absorber Bags

Best Fish to Reheat in the Microwave

• Mild white fish (tilapia, cod, halibut): Lowest odor, reheats well at 50% power
• Salmon: Moderate odor; use lemon juice and sealed container
• Shrimp: Quick to reheat, moderate odor, 30 seconds at 50% power
• Tuna (canned): Strongest odor; best eaten cold or reheated in a very sealed container
• Fried fish: Microwave makes coating soggy; better reheated in oven or air fryer

What to Avoid

• ❌ Don't use full power — it releases more odor and ruins the texture
• ❌ Don't reheat uncovered — smell spreads through the entire microwave
• ❌ Don't overheat — fish goes from done to rubbery in seconds
• ❌ Don't reheat in a shared space without warning others first

Final Thoughts

Reheating fish in the microwave without smell is possible with a sealed container, lemon juice, and low power. The odor will never be completely eliminated, but these steps keep it manageable. And if your microwave does end up smelling, a quick steam clean with vinegar takes care of it in minutes.