How to clear my account notification list?

There are at least a couple different types of notifications here, so this may or may not be what you have in mind: log in, obviously, then in the upper right, click the icon with your username initials to open your account. On the right-side column that pops open under your account icon are a column of other icons. Hover over each one until you find the one (third from the bottom) that is chat notifications. When you click that to open it, you will find a link to “see your notification preferences.” Click that, and you can change the settings for notifications you want (or don’t want) to receive.

If that’s not what you were after, please clarify what you’re looking for.

Similar. It looks like some of them may be going away on its own. Thanks for the info anyway.