Do I need to wash myself after oversleeping in the hotel?

No need.

Concerning hotel hygiene, many hotels use unified cleaning and sterilization, but many times there are sheets that have not been replaced. The sheets that are close to the bed must be checked in time. After entering the room, they must be checked in time. Check whether there are signs of cleaning on the bedding, mainly whether there are creases or signs of sleeping on the sheets. It is best to bring your own pajamas when staying in a hotel to avoid direct contact. If so, call the front desk promptly to request a replacement.

Regarding bathroom supplies, especially in many chain hotels, in order to save money, the slippers used are recycled. Do not use these. You don’t know when to brush them. It is not hygienic, and there are other things. Don't go in with bare feet in the bathroom. The way to clean the bathroom in many hotels is to rinse it. It looks clean, but in fact there are many bacteria. If you often need to stay in hotels, you can go online to buy disposable toilet seats, toilet mats, and toiletries.