Before using the washing machine to wash clothes:
Please empty the pockets (keys, coins, bobby pin, etc.) and remove the harder decorative objects (like brooches) before using the washing machine.
In order to avoid clothing buttons and zippers make sound, close zippers and hooks, make sure the buttons are sewn on tightly and place small items such as socks, belts, bras, etc. in the wash bag.

If you hear noise in the drum of a washing machine, it could be due to several reasons. Here are some common explanations and suggestions for solutions:

Common Causes of Noise in the Drum:
1.Unbalanced Load: If the clothes inside the drum are not distributed evenly, it can cause the drum to shake and make noise. Try rearranging the clothes to distribute them more evenly.
2.Suspension System Issues: The springs or shock absorbers that support the drum might be worn out or damaged. This can lead to instability and noise.
3.Bearings: The bearings that allow the drum to rotate smoothly might be worn out or damaged. This can cause grinding or squeaking noises.
4.Motor or Transmission: The motor or transmission components might be faulty, leading to abnormal noises.

Solution Suggestions:
1.Redistribute the Load: Open the door of the washing machine and rearrange the clothes inside the drum to distribute them more evenly. This can sometimes resolve the issue if it's due to an unbalanced load.
2.Check the Suspension System: Inspect the springs and shock absorbers that support the drum. If they look worn out or damaged, you might need to replace them. This is a task that requires professional service assistance.
3.Inspect the Bearings: Bearings are crucial for the smooth rotation of the drum. If they're making noise, they might need to be replaced. This is a complex repair that need be handled by a professional.
4.Call a Professional Service: If you're not confident in performing any of these checks or repairs, it's best to call a professional repair service. They will have the necessary tools and expertise to diagnose and fix the issue.

Before attempting any repairs, make sure to unplug the washing machine and disconnect it from the water supply to avoid any accidents. Remember, safety should always be your first priority when dealing with any electrical appliance. 

If you're not comfortable performing these checks or repairs, don't hesitate to seek professional service help.