1. As the title says, what do you do if they roll a wash? So 2 success, 2 failures, 1 Advantage, 1 Threat. Net result 0 success/failure, 0 Advantage/threat.
We've been re-rolling most of the time.
2. Does an attack still hit on a wash? My first instinct is to say no, but when attacking all successes (including the first one) add to damage. By that logic, no successes and no failures could hit with no bonus damage. One of my players brought this up.