How best to reformat an MBA SSD?

2nd Gen MBA with 128MB SSD. This has had very intensive use and the SSD
appears to now run quite slowly, in line with what I have read about SSDs with
no TRIM command or Garbage Collection.

Any advice on best way to reformat to original state?

I believe the standard Disk Utility format may not be the best way?

Thanks in advance

Disk utility should be fine, you would be best to reformat it to DOS format - which is FAT32 - to ensure the card can be used by both Mac and Windows machines