Some devices just aren't worth the hassle in warm weather. Consider retiring any that:

• Have a fixed airflow that you can't adjust—if it's already tight, it'll feel worse in heat.
• Show signs of internal residue that won't come off with a simple clean.
• Are older than two years, especially if the battery feels weaker than before.

Retiring doesn't mean throwing away. You can recycle the battery and dispose of the rest properly. But keep your stash clutter-free and working.