How to wash away the rusty spots and other stolen goods on the hotel white sheets?

(1) Put a small grain of oxalic acid on the rusty spot, drop a few drops of warm water, gently rub it, and then wash it with clear water. Pay attention to quick operation to avoid corrosion.

(2) If there is fresh lemon, squeeze out its juice and rub it on the rust for several times until the rust is removed, and then wash it with soapy water.

(3) Wipe the rust with 10% acetic acid solution, or soak the contaminated part in the acetic acid solution, and then rinse it with clean water the next day.

(4) Wet the rusty spot with 10% lemon solution or 10% oxalic acid solution, then soak it with concentrated brine and rinse it off the next day.