There was a drop of blood on the sheets when I stayed at the hotel, and the hotel would deduct 30 yuan from my decontamination fee. Is this reasonable?

Look how dirty it is. If it's an ordinary stain, it doesn't matter. If you spend money, you have reason to spoil things.

However, if you get some stains that are extremely difficult to remove, such as blood, ink, oil stains, etc. This will affect the reuse of materials, and you will have to deduct money.

General hotels may have to deduct 50. I remember that hotels with more than three stars are around 100 to 200.