That sucks . try this find an off road shop or even better try a race shop and buy a bottle of mud off and a one gallon plastic yard sprayer total cost is around 25.00 . this stuff is like armor all in looks and feel, but we use it on race cars and also the truck and trailer before long trips , bugs and tar along with road dirt wont stick . also use it every place under hood wheel wells every thing . it will save your hard work . we use close to 50.00 to wash the complete operation each week and can drop that by half with mud off and dont need to hand wash the wheel wells each week . if you leave your car uncovered in your garage it will stop over spray when using spray paint from cans .i hope this takes a little edge off your day