I take mine through express washes every now and then for convenience and because it gets the stuff off my car that can really harm the clear coat and paint (sap, bird dropping, acid rain, etc..). I will was my car myself every now and then and enjoy doing it but I suck at drying it because I always have streaks or water marks. It doesn't help that I do it on really hot days where it dries really quickly outside (gets on my nerves). It's usually either way too hot or way too cold here to give good washes, on those rare days I will usually do my inside as I can use the commercial car washes for the outside real quick.
I try to seal my car once or twice a year as well and that helps prolong the paint and adds a nice shine. It also makes it much easier to clean as most of the water/debris just beads off. Mine will usually last a good 3-6 mo. That whole process takes a long time though, usually 6-8+ hours including hand washing, claying, sealing, buffing, and drying. It will usually take me an hour or so do to the inside of the car too. I use water based cleaners on the seats, steering wheel, and shifter skirt, and water based conditioner too, then drying them off. The dash, door panels, and armrest can all get armoral (never ever use on your leather). I forgot what window cleaner I use on my glass but it doesn't have ammonia in it because ALL of my windows are tinted (50% full windshield lol). I'll also clean my weather tech floor liners with some Dawn and water.
As for the exterior make sure you go from top to bottom as a general rule. Be careful around the wheel wells from debris from your tires. I make a rule to NEVER use an implement on your car if it is also used on your tires. I have a mitt/brush from my tires only and other pieces for my car's body. Those tires put out some nasty debris when you're braking including metal shavings, using the same mitt on your tires can transfer those debris onto the mit and if you go to your body you're now just creating microscratches all over your car, or even larger visible ones immediately.
2014 Kia Cadenza, Metallic Bronze and Beige, Lux Package
-Full Korean K re-badge
-Ultra Racing Performance front strut tower bar
-Racing sport pedals
Cadenza products available at: https://www.k5optimastore.com/collec...denza-products