How to remove hardened dough from hair? Besides cutting the hair or applying conditioner or oils, what else can be done to remove hardened dough from hair?

Would vinegar dissolve hardened flour? 

Update: The lump is an odd consistency: between a live dough (super gluey) and tough and with a slight give, very slight. I feel like the gluten is being released and water is both releasing it and releasing a few hairs. Any strands of hair that can be freed seem to have live dough on them which, if not cleaned, contaminate other clean stands. Pushing/ scrubbing with the nails is the only, and very hard, way to get that tiny sticky amount out of the individual hairs. A shampoo with sodium lauryl sulfate helps, but it is still very hard. 

I am wondering if there is an enzyme that dissolves gluten. A quick online search recommended tablets for people with who cannot tolerate gluten, not I am not sure if I open the pill tablet and apply it to the hair, it will work.
Ouch, sounds rough.

Soak it in cold water.  This may be awkward; depending on how thick the dough is, it might require soaking it for an hour.  But it's really the best way.