Signature Scribble value MUST empty

Question

Sample File [HERE]
I want to make the Signature Scribble field EMPTY once the client empties Printed Name or Date. By result Invisible and Disabled it does not remove the value; it hides and make the field invisible only, but once Printed Name and Date is not empty, the previous value shows in Signature.
The point of having Signature Scribble empty, is to avoid other client from using others client signature. I could just put RESET ALL FORM FIELDS, but I have to make specific fields go empty, and one is Signature.
ACTION #1:
Condition:
Printed Name is not empty; and
Date is not empty
Result:
Signature is visible
Signature is enabled
Set focus on Signature
ACTION #2:
Condition:
Printed Name is empty; or
Date is empty
Result:
Signature is invisible
Signature is disabled
Set the value of Signature to empty or null --> Missing. How to set or make a script or actions.
Thank you in anticipation of your positive response.

Answer 1

signaturefieldname.rawValue = "";