Your best bet would be to use the Secure Erase command which will completely delete any data on the solid state drive as well as restoring the drive to it's peak performance. You can do this by using a program called
HDDErase (Click on the "Download Freeware Secure Erase Utility" link). Download HDDErase and then transfer the program to a bootable USB drive. Before you boot from the USB drive though and subsequently run HDDErase, make sure you set the SATA controller to IDE - Compatible / Legacy mode in the BIOS. Once you have that and booted from the USB stick, type "HDDErase" (Without the quotes) and hit enter. It should be rather self-explanatory from then on in.
If you haven't currently got a USB drive which is bootable, if you follow the instructions from this page
here, you should have one in a couple of minutes.