The old caulking will have to be cut or scraped out. Using a razor knife and putty knife, try and pull a small place of caulking up, and pull upward to see if long sections will pull out. Anything left needs to be carefully cut out a little at a time until it is all removed.
Use an exterior window caulk. If you plan to paint over it make sure it is "paintable" caulk. Run the bead of caulk using a caulking gun. You can smooth out the bead with your finger and clean up any residual caulk with a wet rag (this clean uo only works if the caulk is water based...check the tube to make sure it is....it's easier if it is) If you use silicone caulk you can't paint it and you cannot clean up any errors with a wet rag so unless you are real exact in applying the bead I would avoid this type of caulk.
No, it will do nothing. Use warm water with chlorine, or lots of bleach.
NO, worst thing you can do ! -strip ALL old caulk off and clean edges with lacquer thinner or acetone before re-caulking.
When it drys you should be able to rub it off with a rag or your finger.
clean me
You get a bucket of water wet the squeegee and clean the window
you get windex and clean them
Magic.
A stiff brush and a bucket of "30 seconds outdoor cleaner" any good liquid detergent will work use with a stiff nylon brush , rinse off well and let dry before rolling it up for travel.
To clean an aluminum horse trailer you should first wipe it down with a dry cloth on the outside and sweep out the inside. After that use a specially designed trailer wash for aluminum trailers and was it like you would a car. Once it has been rinsed you can clean the tires and windows, again like you would clean a car. For the inside I recommend using a wet cloth and wiping the trailer down and letting it air dry over night.
A electric motor that moves the (window) wiper to clean the window.
Trailer trasher is the term used to describe a celebrity who ransacks their on set trailer between shoots. It requires a extensive amount of time and resources to clean them up.