Some users have reported that their routers were getting too hot and dropping the wireless connection. Here is one solution that lifts the router off of the shelf or other surface allowing for better heat dissipation and improved airflow:
Use four empty 35mm film canisters with the lids removed. Place the router's feet into the canisters to lift the router about two inches off of the shelf or other surface. This extra room allows for both better airflow.
Here is what it will look like:
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