You need a solvent, not a bleach.
Dilution is the solution to your pollution.
And slowly is better.
I'd try windex on a Qtip first. Then maybe window cleaning ammonia. If no removal, try windshield washer solvent, then straight denatured alcohol, then Isopropyl alcohol, Still No? Then go organic, and start with gasoline, then paint thinner, then perhaps dilute acetone (finger nail polish remover)
I wouldn't try any acidics beyond white vinegar, until I found a solvent that removed the selenium product binder (presuming cold blue paste).
Qtips (and painter's tape) are your friends for this.
You just want to soften it, and float it away on the Qtip.
