13 year old girl looking for a hit man, nice.
MOST IMPORTANT RULE — NO SUPPRESSANTS. Cough suppressants trap phlegm.
Other rules ...
1. A clean house isn't enough. It's even more important to keep the air clean. Fresh filters over every ‘central air’ vent, and also I buy box fans and place an air filter behind each of them. Helps to shake out the dust in them once in a while.
I can't guarantee it's safe to do it. Not officially tested regarding a ‘fire hazard’. But I've been doing it for over 10 years, always careful to avoid maximum power on the fan. Normally minimal power. The air in a room gets clean in about 20 minutes, and I keep a smoke detector in my bedroom at night.
2. [Unless you have a health complication ....]
While standing raise arms above your body, preferably with dumbells, with head arched back, and inhale deeply. Then exhale deeply when lowering them. Do opposite what they say. Breath out SHARPLY and inhale more slowly to push out phlegm.
The arm motion shifts your lungs and loosens trapped phlegm.
3. Prior to the exercise I've recently been surprised to learn that mashed potatoes are great for loosening phlem. Doesn't take a lot. Just a small helping as thin as you can stand with cooked butter and some uncooked salt on top. I think cayanne pepper helps too.
4. For low calorie loosening — plain water with less than a shake of cayanne pepper stirred into it.
5. Exercize and/or laughter prior to home remedies helps you breathe more deeply. Always a plus.
6. Realize that inflamed lungs tighten and trap phlegm. That's just the way it is. Be patient with yourself, avoid people with viruses, and avoid second hand smoke as much as possible. A virus will inflame your passageways worse than a little smoke.