These are most likely the dirtiest spots in your vehicle. Put an old sock over the bottom of a travel cup, spray it with window cleaner, and twist to clean it quickly.
Blast out crevice dirt
If you poke around in a car's nooks and crannies, you'll probably find pens, change, keys, mud, and other miscellaneous items.
Get into corners
To clean out tight interior spaces, no special tools are required. Wood skewers and cotton swabs are ideal for cleaning small areas like vents, seams.
Deep-clean fabrics
Spray a foaming aerosol cleaner lightly on vacuumed carpets (and cloth seats, if you have them). Use a vacuum to remove it once it has begun to dry.
Be gentle with plastics
On plastic surfaces, use an ammonia-free glass cleaner. (Ammonia has the potential to bleach surfaces.)