Replace or refresh every 2–4 weeks (when salt clumps or dissolves)
💡 Pro tip: Cover the top with a coffee filter or paper towel secured with a rubber band—lets air in, keeps dust out.
🔬 Why This Hack Beats Store-Bought Solutions
💵 Cost
Pennies
$15–$30
🔋 Power Needed
None
Some need charging
🔁 Maintenance
Dump & refill
Empty reservoirs, recharge
🧪 Effectiveness
Gradual, steady
Fast but short-term
🛠️ Setup
Instant
Often requires clips or hooks
And unlike chemical sprays or gels, salt is non-toxic, eco-friendly, and kid/pet-safe.
🚗 When This Hack Shines the Most
❄️ Winter mornings: Reduce window fog before you even turn on the heat
🌧️ Rainy seasons: Keep carpets and seats dry
🏕️ Camping/RV life: Prevent mold in stored vehicles
🚙 Older cars: Combat lingering damp smells
🚘 Cars parked outside: Fight overnight condensation
Even if you live in a humid climate like Florida or coastal areas, this tiny trick makes a noticeable difference.
💡 Pro Tips for Maximum Impact
🧂 Use coarse salt or rock salt —lasts longer than fine table salt
🔄 Refresh regularly —if salt turns mushy, it’s full. Dump it, add new salt.
