I've tried the 'store bought' washes and soaps to remove the crud, road grime, black streaks and been left wanting.
Several years ago I tried laundry soap 'pods' and bleach and it gets it.
I use the 'that looks about right' measurement method,
1-2 pods of el cheapo laundry soap,
1/2 gallon of bleach
generous squirt of Dawn dish soap
Do a 'top down' style wash, no pre-rinse. Let the solution run down the sides, and keep it wet and moving as long as possible before rinsing.
I've found it even gets the streaks out of the plastic trims at the doorframes and corners.
Tried it out on a buddy's (8 y/o) rig that had set under pines for 2 years, one wash and it cleaned right up.
I do my rig once a quarter, and before major moves I do a second wash with a whole tub of go-jo to slick n shine it up so bugs rinse off.
Several years ago I tried laundry soap 'pods' and bleach and it gets it.
I use the 'that looks about right' measurement method,
1-2 pods of el cheapo laundry soap,
1/2 gallon of bleach
generous squirt of Dawn dish soap
Do a 'top down' style wash, no pre-rinse. Let the solution run down the sides, and keep it wet and moving as long as possible before rinsing.
I've found it even gets the streaks out of the plastic trims at the doorframes and corners.
Tried it out on a buddy's (8 y/o) rig that had set under pines for 2 years, one wash and it cleaned right up.
I do my rig once a quarter, and before major moves I do a second wash with a whole tub of go-jo to slick n shine it up so bugs rinse off.