Indeed some glaciers are growing and gaining mass due to increased precipitation (in part due to climate change and enhanced atmospheric water content). But that's the case only for glaciers in very cold places, like East Antarctica, where most glaciers appear to be growing at increasing rates ([1][1],[2][2]). But unfortunately West Antarctica is pretty much a desert; the total precipitation on average is less than in the Sahara Desert. That is usually the case in very cold places. The capacity of air to hold dissolved water decreases exponentially at lower temperatures. Therefore cold glaciers (the ones that are most often growing) account for a small amount of the total global ice mass change.

In contrast, temperate glaciers (i.e. not so cold) constitute the majority of the most well known mountain glaciers (outside Antarctica and the High Arctic). These in many cases are receiving more precipitation, but the increases in accumulation are in most cases offset by the increase in temperature, which have a double impact:

 1. More melting due to higher temperatures
 2. A larger fraction of the precipitation falls as rain instead of snow, therefore promoting melting instead of accumulation.

Also, the more a glacier melts, the lower its surface will be, therefore it will be exposed to even warmer temperatures leading to further melting.

It is also important to note that glaciers grow due to snow accumulation. It is unclear to me if that's what you meant by "moisture condenses at mountain tops".

Finally, it worth noting that glaciers have been receding since the last ice age about 15,000 years ago. Recent warming has just accelerated the process a bit, but the glaciers were already out of balance and shrinking way before the industrial revolution.

  [1]: http://onlinelibrary.wiley.com/doi/10.1002/2017GL072937/full
  [2]: https://phys.org/news/2017-05-growth-east-antarctic-ice-sheet.html