text: Quick Tip: Use Silica Gel To Protect Your Lenses From Fungi - DIY Photography
  See that image above, it's a fungi infested lens! It is there to serve the same purpose as the picture of the decaying tooth lady in the dentist's office – Don't let this happen to you.
  Luckily, the solution is quite simple. Silica Gel is the substance in those little paper bags that look like coffee-sugar-bags that you find in shoe boxes or coats nylons. They are there to absorb humidity. Luckily you can get silica gel packets for really cheap and place them in your lens drawer (or your other lens-organizing-device).
  1. They are indicating, meaning that you know when they are no longer good. But you don't have to throw them away, cuz they are
  2. Reusable, you can get them back to the dry state by applying heat for a certain amount of time.
  Don't get fungi on your lens, really. It is really hard to remove, and aside from sending it to the pro, there is nothing you can do. (and also sending it to the pros won't always work. Keep your lens storage dry!
  [images (CC) by Angus Veitch and sharyn morrow]
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