Greetings.
I haven't played the Well-Tempered Clavier yet. However from my experience with Bach's staccato, it is more of a half legato, half staccato. Light and clear, yet somewhat prolongued. These should be played not so much with fingers, but with the entire arm heavy playing the notes.(I do a horrible job explaining). In other words, the staccato I emplored was that of a somewhat legato, singing in manner bright staccato, never legato. However since you are playing the Well Tempered Clavier the technique might be different. There isn't an only way, but I'm guessing its the one I used. The point is clarity and the singing manner. I also sing so for interpreting Bach I sometimes look at the corellation of voices as Tenor, Bass, Baritone, Alto, Soprane. Bach's music wasn't directly written for the fortepiano, but rather the harpsychord. The harpsichord isn't capable of producing the legato sound that our instruments can. It was rather a sound in granules. So one might try to "imitate" the sound. These are just suggestions. Anyways, I'm delighted to help anyway I can.

Best Wishes to all.