Hiya,
I learned not to be lazy cleaning your car the hard way 3 years ago.
I imported a modded Skyline R33 Gtr from Japan and sent it to a good local valet shop for the full works, I had used them a few times and they had always done a fantastic job.
I got a call 4 hours later from Paul the owner expecting the car to be done but was told they could not get it to start. hmmm strange I thought it had not been a problem.
Cut a long storey short 1 of the deadheads had washed off the engine bay with the car running, pressure washed the HKS intakes!!! which had sucked water into the turbo's & engine and then to top it off blasted the ecu sender unit blowing it completly plus the HKS after market ECU & boost controller link unit & the Defi gauge sender unit.
After a few legal letters a court summons and 9 weeks hassle there insurers agreed to pay the £4600 bill to put the car right.
The valet shop told me they didnt want my business again! as if I was gonna be going back, made me laugh though
Darren