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      06-15-2019, 06:20 PM   #10
Brigadier General

Drives: M235i 6spd
Join Date: Dec 2013
Location: Mid-Atlantic

iTrader: (0)

Originally Posted by GuidoK View Post
You can use a glycol test kit. They are used to determine gasket leaks in large systems (industrial systems). T

A hydrometer or refractometer could spot a difference with a known washer fluid but it can't determine the chemical contaminant.

But the complaint was smearing which is a known effect of glycol. No concentration of washer fluid is going to cause that.
Flush the system and its solved. 2 min work and $1 worth of washer fluid. For that no one's going to mess around with laboratory tests.
Had u read that anything other then BMW style washer fluid can malfunction the washer lever sensor ?

Halfway down page in the link below.