Hi Dawn,
Thanks for sharing your feedback.
In regards to the condensation, a sink that that recently had cold water flowing through it can end up below the dew-point of the air in the cabinet below. This would cause typical condensation, but with the Kraus adhesion, it will minimize the effect.
If there is an abundance of moisture / condensation, then it is possible that there is a leak in either the drain or supply plumbing (or the exterior wall is letting humidity from rainwater- cement & plaster pass humidity quite easily) increasing the humidity of the air under the sink. In which case more ventilation may temporarily reduce the problem, but it's better to find & fix the leak.
We also want to assist you in any way possible and have created a case for you here with our Customer Service Team. Case # 153268. Please feel free to reach out to us at 800-775-0703 or via email at customerservice@kraususa.com and reference your case #153268.
Our goal is to make sure you are 100% satisfied with your Kraus product. Please contact our customer service at 1-800-775-0703 or customerservice@kraususa.com and reference case # 153268 if you’d like to continue the conversation.
Best,
Mike
Kraus USA