March 2023 Power BI Update included a new button option for clearing all slicers. You no longer need to create a bookmark etc. You can reset slicers very quickly.

The bookmark method that would also clear filters applied by clicking on visuals can be found
   • Power BI  Reset Slicers with a Bookm...  

Table of Contents
00:00 Introduction
00:13 Applying Slicers
00:54 Add Clear all slicers button
01:47 Word of caution