Moisture will get inside your frame, whether as water or condensation. No matter how you try to prevent it, moisture will get in your frame. So protect your frame.
Under normal conditions, we suggest using a liquid rust inhibitor (such as Frame Saver™) annually as part of regular maintenance. In areas of the world where salt and chemicals are used on roads, or areas near ocean moisture, corrosion can be more of an issue. In such cases, we recommend treating your frame more often (twice a year or as often as you feel necessary).
A schedule could look like this:
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Rust inhibitor applied in November: This will protect your frame through the toughest winter months. Road salt and wet conditions are the harshest on steel.
Rust inhibitor applied in April: This will protect your frame through the summer rain and humid weather that occurs in some areas.