Do I need to rinse these jellies off or can I wipe them dry?

Wipe off with a microfiber towel after use. Rinsing works too if you prefer extra clean, but these formulas don't leave residue behind.

Which color jelly does what—is there a chart for which to use where?

The kit includes three formulas for different jobs, but the specific color-to-surface guide isn't included with the kit. Test on a hidden area first, then use whichever works best for your target surface (vents, trim, glass, tight spots).

Will these work on leather seats or only exterior trim?

These are engineered for plastic, rubber, and painted surfaces. Test on a small hidden area of leather before applying to visible sections, or stick to exterior trim and interior hard plastics to be safe.