What produces a new material change is what a candle melts, two pieces of wood made of furniture, th

There are two main types of yellow dirt, one is metal (mainly iron) rust, and the other is urine alkali; There are two main reasons for this, one is that it is not flushed and cleaned in time after use, and the other is that the glaze layer of porcelain tiles is not acid-resistant. Solution: First, flush and clean in time after use to keep it dry; The second is to use less acidic detergents and less hard tools to scrub, because the acidic substances not only cannot be restored after corroding the glaze, but the surface is also prone to pits, and it is easier to form dirt; Hard tools are also prone to scratching surfaces. >>>More

Methane, fermentation of inorganic and organic compounds in the body!

Most likely, it is urine swill, which contains salt and is easy to crystallize, but it will only crystallize if the urine swill stays for a long time. It could also be a crystalline similar to anti-alkali, but that should be on the periphery of the toilet. It may be that the toilet is leaking.

Try to buy solid wood furniture, or samples of big brands in the store. >>>More

It is mainly the smoke emitted by the scorched food remaining in the tiny pit on the surface of the pot, and the vaporization of the oil accounts for only a small part. There is also smoke when there is no oil in the pan when it is heated, and this is the reason.