Like Jetzt said, the tank water can reach around 90°C, which is fine, and that's why the braided metal hose gets ouchy hot. That's why you have a mixing valve that mixes this hot water with cold water to create warm water for your taps (going into the red plastic pipe, which is rated for up to 65°C). Check the actual temperatures of things, above 40°C your hand will only tell you "ouch hot" and cannot differentiate between 65 and 90. Any hotter than that, the water turns to steam, creating pressure and the pressure relief valve on the tank (red cap usually) will vent this, which you would notice.
The Eberspaecher air ducts are rated for 95 (150° peak) temperatures and should not melt from this, but it looks more like it was crushed by the pipe than melted. They're very flimsy and easy to crush if not careful. Just move it away a bit so they stop touching.
Blowing warm air into the limber holes and through the stringers will dry it them out well, but if there is salt (from salt water leaks) trapped inside, it will attract moisture from air again, so you need to rinse the salt out first before drying.