What if the sheets are not clean and there is no photo evidence?

1. Complain to the front desk or customer service of the hotel: If you find that the sheets are not clean, you can immediately complain to the front desk or customer service of the hotel and ask for replacement or cleaning of the sheets. If the front desk or customer service says that the problem can't be solved, you can ask for compensation measures such as room upgrade or refund.

2. It is mentioned in the evaluation that if you are not satisfied with the service of the hotel, you can mention that the sheets are not clean in the evaluation for others' reference. If this is true, the hotel staff will ask the customer to withdraw from the bad review and propose some compensation measures to the customer.