My wife's rule has always been shoes are left in the entry way. While I do well for sexagenarian - mountain bike, ski, trail work, exercise - foot and hand pain have been a growing problems. After a new clean pair of shoes to wear inside it only took 2 days to notice improvement. It's crazy to be around age 17 mentally but have some physical issues creeping up. My wife and kids harassed me for getting an umpteenth pair of New Balance 990s but their 990 and 1540 that have width options again proved to be near instant instant happy feet. Some associates have thought it strange that we leave shoes at the door but I think it's strange to spread the filth they pick up all over your home. Part of the problem is hard floors, and it seems strange to have shoes on if I go upstairs.