Actually some Smith goggles have a technology that according to them can be cleaned without wiping off...
Smith Technology | SmithOptics.com
"A hydrophilic chemical treatment creates a micro-etched surface on the inner lens to absorb moisture before fog can form. Because Fog-X is a treatment that is actually burned into the lens, it canít be wiped away like other anti-fog coatings."
No idea which of their lineup comes with this treatment but it sounds promising.
pretty sure that's just on the new IOX. and $$.
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