Information, tips, and myths - No.8 - Optimising your SSD
Open the Windows 10 Start Menu and type "optimize" into the search box. Select "Defragment and Optimize Drives" app from the search results. The Optimize Drives window shows connected drives that can be optimized. Select the C drive from the list and then press the "Optimize" button to manually start trim.
If you have a look at optimize occasionally, you may find that even though it has been set to run automatically, it has not done so.