Before cutting cucumbers, some people rub them to get rid of the possible waxy covering on the skin. Cucumbers frequently have this coating applied to them to help keep them safe during transit and storage, but it can make the skin tough and challenging to chew.
To help remove this coating, rub the cucumber with a little salt or vinegar. This will improve the texture of the cucumber and make the skin easier to consume. Additionally, some individuals think that rubbing cucumbers with salt or vinegar will help to improve their taste and lessen any potential bitterness.
Not all cucumbers have a waxy coating, and some types may be less bitter than others, so it's important to keep that in mind. You can taste a tiny piece of the cucumber's skin to determine whether or not it's tough or bitter before deciding whether or not to rub the cucumbers before cutting them. Then, change your technique of preparation as necessary.