The easiest way I've found to unlock this achievement is to buy the "Scapegoat" augmentation which makes it so that whenever you mistype, instead of breaking your Perfect Input streak, it will destroy one of your drones.
Next, make sure you get the "Hunter" and "Spectre" drones and type away. If you're fast enough, you will never run out of drones which will in turn never break your Perfect Input streak. If you want even more security, you can get any upgrades that will increase the duration of your Hunters and Spectres which will basically guarantee you this achievement.
If you have any ideas on how this guide could be improved, don't hesitate to comment.
Happy achievement hunting!