For those of you who have Brilliant White jeeps, how do you guys keep it clean? I wash my jeep every couple of weeks or so and there seems to be specks that are almost impossible to clean. I try not to scrub hard to avoid scratching the clear coat but man it's tough. I tried clay bar too but still won't do much. Is there something that's strong enough to remove the caked on dirt and at the same time easy on the paint/clear coat?