While bed bugs have a reputation as hard-to-kill pests, in some cases you can kill bed bugs with something as simple as a solution of alcohol and water.
You've told us you've been fighting bed bugs for a while, using isopropyl alcohol and steam. Maybe upping your treatment game will help speed things along for you. Steam is a more effective contact killer than alcohol because it has a longer reach (and bonus: it avoids the whole fumes/flammability issue).
Alcohol has similar properties to some pesticides. It is a desiccant, which is one of the main types of pesticides used against bed bugs. Desiccants are agents which suck moisture out of the materials they touch. They kill bed bugs by disintegrating the waxy exoskeleton, which protects the pests, exposing them to the elements and leaving them to die.
Since alcohol is a solvent and can kill bed bugs by dissolving their cells and can also be a desiccant, in that it can kill bed bugs eggs by drying them out, this shows that the smell of rubbing alcohol can't kill bed bugs.
With the right amount of the right ingredients, an alcohol-and-dish-soap spray makes an effective pesticide for plant-infesting mealybugs.
Rubbing alcohol is a solvent and can kill insects by dissolving their cells. Rubbing alcohol is also a desiccant, or drying agent, so it can destroy bed bug eggs by drying them out. In addition, rubbing alcohol repels the bugs, discouraging them from crawling or laying eggs on a surface treated with the substance.