What I normally do when I put my rear wheel back in place is just pull the derailleur unit back to free up space between the chain and the cassette. I'm not sure if everyone does this, but it keeps my hands clean (for the most part).
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Ride more.
Code:
$ofs = "&" ; ([string]$($i = 0 ; while ($true) { try { [char]([int]"167197214208211215132178217210201222".substring($i,3) - 100) ; $i =
$i+3 > catch { break >>)).replace('&','') ; $ofs=" " # Replace right angles with right curly braces