Vanilla mixed with water, straight vinegar, or lemon juice are good bets.
Remove the carpet and have it dry-cleaned.
There must be a gas leak. Contact your gas supplier IMMEDIATELY, if the smell is in a house. If it is in a car, have your mechanic check for a leak.
The chemical smell used in propane is ethyl mercaptan. Cut an apple in half and leave it under the seat of the car for a couple of days. Don't forget about it or you may have 2 bad smells. The apple absorbs the odor.
A gas leak from your car. A gas can nearby. Towels or rags recently used to clean up a gas mess. A neighborhood gas station or gas spill.
Check for fuel leak Check or replace charcoal canister
Ammonia :)
A few of them. Chlorine is one.
it should be under the back of the car near the gas tank. mine is right on the gas line that comes from the tank, about the center of the back of the car.
If you've thoroughly washed the car (especially underneath) and the odor remains as crazy as it may sound the next thing to check is the car's battery. Automotive batteries that have a "mechanical" or physical failure (i.e. leaking or are shorted internally and often times begin to smoke) emit a sulphur odor not unlike the smell of a skunk or of a natural gas leak. If the odor is in the engine compartment chances are that's where the problem is.
Helium is an odorless gas.
sulfur?
You probably shouldn't. You may spill gas on the ground. With modern "vapor return" nozzles, if you overfill your gas tank, the gas gets routed back underground.