How to solve the bed always have sound
Your bed is certainly assembled you pressure four corner junction wriggling. Were two bedstead a bed
Is fixed with a 8 mm thick flat screw, you can put it down again, and then all the screws have a layer of oil (lard and oil can be) if some links can be in discord, before the wrench to tighten at the combination pad a piece of wood or cardboard or iron.