I am trying to drain the float bowls on my 89′ Kawi Ninja. I drained three, but I cannot reach one?

The bowl screws are of course facing one way, it is incredibly difficult. There is almost no clearance, I fidgeted with it with even the smallest screw driver for thirty minutes. The bike has been sitting 10 days, has fuel stabilizer, but I am afraid of jets getting clogged. Anyone have any tips?