Diagnosis
The silicone sealing ring in the Instant Pot Duo Plus 9-in-1 is designed to be flexible and heat-resistant to maintain a tight pressure seal, but the material is inherently porous. Over time, aromatic compounds from strong ingredients—specifically turmeric, cumin, garlic, and fish oils—penetrate the molecular structure of the silicone. This isn't just a surface-level residue; the odors are trapped inside the material itself. When the pot reaches pressure, the heat causes these trapped volatile organic compounds to release, effectively "steaming" the scent of previous meals into your current dish. You can confirm this is the issue by smelling the ring directly after a wash; if the ring smells like curry but the inner stainless steel pot is odorless, the silicone is the culprit. If the ring feels tacky or sticky to the touch, the oils have deeply saturated the seal, making a simple soap wash ineffective.
How to Fix It
To strip the deeply embedded odors from your Duo Plus sealing ring, follow this aggressive decontamination process:
- Remove the silicone ring from the lid by grasping the edge and pulling it firmly away from the metal rim. Ensure no food debris is trapped in the lid groove.
- Create a soaking solution in a separate bowl using 2 cups of warm water, 1/2 cup of white distilled vinegar, and 2 tablespoons of baking soda. Submerge the ring completely and let it soak for at least 4 hours, or overnight for severe curry smells.
- Rinse the ring under cold water, then apply a paste of baking soda and a small amount of water directly to the silicone. Scrub vigorously with a soft-bristled brush to lift surface oils.
- Perform a "Steam Clean" cycle: Place the ring back in the lid. Add 1 cup of water and 1 cup of white vinegar to the inner pot. Close the lid and set the Duo Plus to "Pressure Cook" on High for 5 minutes.
- Allow the pot to perform a natural pressure release (NPR) for 10 minutes before venting. This forces the vinegar steam through the pores of the seal.
- Remove the ring and hang it to air dry in a well-ventilated area or outdoors in direct sunlight; UV rays help break down remaining odor molecules.
If That Didn't Work
- The Lemon Juice Boil: If vinegar fails, slice two whole lemons and place them in the inner pot with 3 cups of water. Seal the lid and run a "Steam" cycle for 15 minutes. The citric acid is more effective at breaking down certain fishy or pungent spice odors than acetic acid.
- Activated Charcoal Bath: Place the silicone ring in a sealed plastic container with a small mesh bag of activated charcoal pellets for 48 hours. The charcoal acts as a molecular sponge, drawing the odors out of the silicone without using chemicals.
- The Dual-Ring System: Purchase a secondary official Instant Pot sealing ring. This is the only foolproof solution for heavy spice users. Designate one ring (often the blue or red colored ones) exclusively for "Salty/Savory" foods like curries and chilis, and keep the clear/original ring strictly for "Sweet" foods like yogurt, cheesecake, or steamed puddings.
- Complete Replacement: If the ring has developed small cracks or has become permanently discolored (yellowed from turmeric), the pores are too damaged to be cleaned. Replace the ring with a genuine 6-quart Duo Plus replacement part to ensure the pressure seal remains airtight.
Heads Up
- Avoid using bleach on the silicone ring, as it can degrade the material, leading to pressure leaks and potential safety hazards.
- Always store your Instant Pot lid upside down (resting on the lid) or leave it slightly ajar; storing the lid closed traps moisture and odors, accelerating the "stink" buildup.
- Inspect the ring for stretching every 6 months; a stretched ring will not only leak steam but will absorb odors more quickly due to the thinning material.
- When using the "Sauté" function for heavy aromatics before pressure cooking, wipe the rim of the pot clean before locking the lid to prevent grease from migrating into the seal.