Window cleaning is something we all need. We keep hearing the same statement. Were has my Window cleaner gone. Answer. Off doing more profitable work. Like pessure washing. We made that mistake. We will stay reliable.  
We usa mixture of traditional and pure water cleaning.
I personally see better results with pure. But 100 most be pure water. ie ie 0% TDS. 
We guarantee this, Or full refund. no questions asked.