If you travel a lot, you'll need to know some of these hotel-hacks to make your stay a little more comfortable. Here are the 10 secrets most hotels don't want you to know. They won't immediately advertise them. Check it out below:

1. Only sheets are changed every day at most hotels. Blankets are washed weekly and bed covers might get some soap and water monthly. Ask for everything to be cleaned. 

2. The valet is not responsible for your car. Hand your keys over at your own risk.

3. Hotel TV remotes are filthy, crawling with rhinovirus - a germ that can cause the common cold. They are rarely cleaned.

4. Hotel pools are okay because they are highly chlorinated which kills most bacteria. The tables and lounge chairs on the other hand are probably very very filthy.

5. To get a cheaper rate, call the hotel to book your room and politely ask if there's any way to reduce the rate. They're pretty flexible. After all, it's really competitive out there.

6. Wash the glasses by hand before using. They are really dirty.

7. Early check-in could be bad for your health because there's no telling how clean the room might be.

8. Most hotels will offer complimentary in-room movies. Ask at during check-out.

9. Concierges could be a good thing.

10. If you really nned to cancel and want to avoid the fee, call the hotel and move your reservation into the future by a week or two. Then call the next day again to cancel and pay without a penalty.