How to report shit found on hotel sheets?

Complain to the hotel front desk or customer service. According to the customer's presentation in the article, complain to the hotel front desk or customer service: if you find that the sheets are not clean, you can complain to the hotel front desk or customer service immediately 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.