Add 1/2 teaspoon of salt to eight ounces of warm or lukewarm water and gargle after lifting your head back. To help cut the mucus even more, add the juice of 1/2 lemon to the salt water and gargle. If allergens are haunting your sinuses, the only home treatment you may need is a treatment of your home. Try the following suggestions to remove dust, pollen, and dander from your residence before they come back to bite you — in the nose.  Wash your clothes, sheets, pillowcases, and mattresses in hot water regularly. Hot water will kill any bacteria that may be causing your symptoms. Vacuum regularly with true or absolute HEPA filters. Vacuuming with HEPA filters ensures that any allergens are picked up during the vacuuming process. All 3 may make mucus production worse, so it is best to avoid these while you have a cold. Try out a DIY steam treatment by covering your head with a towel and placing it a safe distance from a pot of warm water. Make the steam treatment aromatic by adding tea (ginger, mint, or chamomile, for example) or essential oils (lavender, rosemary, etc.). Take a warm shower. Let the steam of the warm water work its way into your lungs and sinuses while you bathe. For this you'll need 3 cups of tea (1 huge cup) and hot water. Add sugar to taste and a little honey. Squeeze in the juice of 1/2 dark green lime. Drink this concoction first thing every morning without food. The lime will clean your liver and your stomach (full of last night's mucus due to the postnasal dripping) and you'll feel lots of energy throughout the day.

===
Write a summary of the previous text in Vietnamese:
Pha nước muối súc miệng. Dọn dẹp nhà cửa. Hạn chế caffeine, chất cồn và đồ ăn cay nóng vì chúng có thể khiến dịch mũi tiết ra nhiều hơn. Dùng biện pháp xông hơi bằng thảo dược hoặc tinh dầu. Thử chữa bằng chanh.