Windshield install question

[bean]

Tried over and over again yesterday to install windshield in my 72 but no luck. Couple of questions... Which is easier starting at the top of the bottom? Secondly what have you guys used for lubricant? I tried soapy water as well as glass cleaner but in this texas heat both seem to dry really fast. Seemed like my biggest struggle was getting the glass centered in and the windshield wouldn't move much. Anyhow any and all help is appreciated.