Adding condensation effect on a texture How to add condensation effect on a texture?

The way I add condensation effect is to add a texture image (condensation) to object material. However, I don't think we can use this method to add the effect on a texture? As it would be like adding texture on to another texture.

For example the label(coke) in picture below are a texture, how do we add condensation on it?



Thanks in advanced.
You can use a Normal map for the condensation.
That way you don't need to mix anything, just plug it into normal input.



Example of a normal map.
You can download this one for free from Poliigon.  



Connect the normal map like this.
Use different Mapping nodes and perhaps UV maps for better control.