Quote from @Jonah Stavsky: Pay the bill and consider it your tuition fee.You should always try to troubleshoot problems with the Tenant before sending an expensive technician.

You can try to troubleshoot with the installer and get them to make it right, however if they are unable or unwilling, you could have to look into getting a refund on their work and finding another installer to put in the windows.

@David Eiges I can't help you trouble shoot.

Looking to connect with fellow Real Estate Podcasters out there, of course BP's Podcast is the bomb, but looking to meet and greet with  others using the medium to share ideas, troubleshoot, or just talk shop!

Unfortunately, it's unlikely that there's going to be a simple bandaid solution.What you need to do is get someone out there who understands the building science behind insulation strategies and can help troubleshoot the actual reason for the condensation to be happening.

No managing contractors or wasting time troubleshooting "easy problems". 

Between family life, work and what time is left over, I would not want to spent it troubleshooting problems, showing vacant homes, calling past due tenants, going to court, etc.

Trouble shoot why the ceiling grid is carrying 19 volts(Think its the ballast)  Install new floor, instal kitchen cabinets I sanded down. 

Identifying the problems on your first deal and starting to trouble shoot them will help you down the road.  

If the water hasn’t drained after the cleaning then you can trouble shoot a couple of other potential issues like a kinked drain hose (YouTube will have several videos) or call a technician.