I use three methods for cleaning off the dial.
The first is to use a dust blower. Check it with a loop to see if it is clean.
The next step if that does not work is to use a dial cleaning brush. Be gentle with the contact. Touching the dial is always an area the can cause damage. These brushes are designed for dials, but don't be too aggressive. I follow this with the dust blower.
If it still has particles, I use Rodico on a stick to pick up the small specks. I've done this on dials for years and it works great, as long as you only apply enough pressure to pick-up the dust or fiber. Also don't reuse Rodico if it has touched the movement then touch the dial. Last thing you want is to transfer some oil to the dial.
Do not use a cloth or anything that can scratch (no matter how soft it looks). The only pressure should be with the use of Rodico if needed. Otherwise stay away from dial contact.
As for changing the hands, it's you watch, try it. If you don't like it, change it back.
DaveB