Use the stuff on those stains it can still touch
From Fallen London Wiki
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From: Suspicious stains? Employ Nikolas & Sons Instant Ablution Absolution!
You don't get to the top without acquiring a few stains that even the Ablution Solution can't shift. Its effects are less than impressive these days.
Game Instructions: If your Criminal Record rises too high, this will no longer be effective.
Unlocked with 
1 x Nikolas & Sons Instant Ablution Absolution, 
A Person of Some Importance -
Locked with 
A Criminal Record: 4
Success
Stains too dark for burning
What terrors lie in your past? The Ablution Solution sizzles like water on hot iron. The stains fade only reluctantly.
You've lost 1 x Nikolas & Sons Instant Ablution Absolution
Suspicion is dropping… (-1-5 CP)
Scandal is dropping… (-1 CP)
