Common problems with hotel rooms include cleanliness, electrical items not working and issues with the bathroom (a major issue). If you do discover a problem you should first call down to reception and ask for the problem to be rectified or for you to be moved to another room. If this doesn’t seem to get you anywhere you could ask to speak to a manager. Tell them that you have tried to sort the issue out with reception but to no avail so therefore have had to escalate the problem.
If you are still not happy with the outcome you could write a letter of complaint when you get home or if it is a chain hotel, contact the head office.
Most hotels are keen to rectify problems quickly as they often get a lot of business through word of mouth, so don’t stay quiet!