Ive gone to several local hand washing places in atlanta twice a month for over 2yrs now and even if my tires are not shined you will drive through puddles of soap and previous customers' tire shine. My rear end always feels like driving on ice/oil for a block or two.
My solution (or excuse) is to give a brief tire spin/slide exiting the carwash and by cruising straight for a few blocks keeping extra space in front (for panic stops) to dry the front tires. Rear slippage is typically scarier than understeer, hence the immediate tirespin on dry asphalt when exiting. I can imagine accidents when merging into traffic from the car wash if traffic is quick and heavy that day.
2006 Exige (Graphite Grey) - Hyper motorsports roll cage, 5pt harness, VFII supercharger, stage 2 exhaust, Larini decat, BWR street/track swaybar, BOE surge tank, gPan2, ACT HDSS, motor mount inserts, 0.715 6th gear, CL RC6/RC8 pads, sector111 steering arm, Quantum single adjustables, proalloy radiator, BOE/Fastworks level 2 full suite
JVC KD-AVX44 (rear-view camera), BTA6100 bazooka, polk audio front/rear, MTX Thunder 4-way amp, carbon fiber side scoops, LED strips (Audi style accent lights)