Quick Answer. A bad mass air flow sensor in a vehicle makes starting difficult and affects the performance of the engine because he engine-control unit uses data from the MAF sensor to balance the fuel ratio the injectors deliver to the engine.
While porcelain tile boasts exceptional durability, there are few products and techniques you should take pains to avoid: 1  Never use a product containing ammonia or bleach (or any type of acid-based cleanser); these can alter the tile color and/or stain the grout. 2  Never use oil-based detergents or wax cleaners.
Vinegar, bleach and borax powder are some examples. Bleach -- If you want to use something stronger than vinegar, then use bleach. Bleach is best used when the rings and stains are already too tough. Pour half a cup of powder into the toilet bowl. Leave it that way for a few hours before you flush the bleach away.