Fuel smell in cabin on 10 Mini S Turbo convertable

I bought my Mini about 3 weeks ago from the Mini dealer and any time I
have the top up I experience a strong fuel smell in the cabin. I am changing
out the regular maintenance items (plugs(iridium), filters(K&N), etc) to see
if that helps. I have read a few places that the intakes will get a lot of
carbon build up, but I don't know if that would force fuel to go through the
system unspent so that I smell it inside. I don't see any visible cracks,
breaks, or otherwise on the fuel rail or the hoses. The turbo kicks in and
does great, so I don't it's that. It also doesn't seem to have any air flow
issues, so I am ruling out the MAF. I am looking for suggestions before I
take it back to the dealership and lose it for a few days. My husband says
just leave the top down all the time. I want to agree, but eventually it will
rain. Thanks in advanced for the help.