Originally Posted by
thijsseh
Reading all of the above it appears to revolve (pun intended) around wheels. So roll on (pun again intended) the new generation of carry on luggage where the wheels can be removed and stowed in a special small compartment shortly before adherence to this rule is checked.
Perhaps the Turkish Government have sponsored the design and production of a new range of detachable wheelie luggage

I'm still interested to know how wheels increase the contamination risk.