I always spray them down with softner/viynal but want to clean them to get dirt off.

Good ole Dawn dishwashing liquid and a soft bristle brush works for me. Be careful on using harsh chemicals on the vinyl. It can harden it and take all the oil out of the material.

For a real good deep clean I have used Comet.

orange hand cleaner, some awesome stuff for dirt/oil/grease and won't harm vinyl

3m makes a vinyl cleaner/reconditioner. I have purchased it at WalMart, but can now only find it at Acamdemy. I does a great job of cleaning and leaves the vinyl very soft. After a good scrubbing it only takes a small amount to wipe down and maintian.

Magic eraser. Just know once you start there is no stopping.

Simple green and a brush works great.

I Mix "Super Clean" (Purple Bottle)... from the Wal-Mart Automotive section not to be confused with "Purple Power" in the white bottle in a 50-50 water dilution, used full strength will get of Anything but it's a little Harsh , Tires ,Wheels, Engine, you Name it'll get it Clean ... if it don't it probably won't come clean ...Be Carefull on Aluminum.....

After you clean seats if you will wipe seats with vasiline it is a protelem base that will replenish the oil base of seats and they will stay soft and not stain it make your seats last a very long time it also keeps stitching from rotting as well i have done this for many years works great

What would you use to remove small spots of mildew.

that magic eraser works wonders