Been using he hot wax method on our tandem(s) and single(s) since the mid 1970s. That's over a quarter MILLION miles for us.
Less fuss and muss than any other method.
Lasts for about 5,000 to 6,000 miles between waxings for us here in Arizona. When I hear the slightest chain squeak, it's time to re-wax.
Another benefit: chains last longer and no chain tattoos . . .
Pedal on!
Rudy and Kay/zonatandem