Clean grill cloth; repair Tolex

Is there some way other than vacuuming to clean the grill cloth? I'm thinking of something more rigorous like shampooing/spraying it.
Also, how does one repair a gouge in the Tolex which goes to the wood structure (the black is missing)?

Take out the speakers!
Gently spray on (not soak) one of those 'Orange smelling cleaners'. Let it stand (not dry), then gently damp sponge to remove dirt and excess cleaner. Let it dry, don't expect miracles, and don't do anything 'rigorous' unless you want to re-upholster the grill. Lather Rinse Repeat.
Fill any wood gouges with hot-glue (for wood).
Shape it, if necessary, with a shinge edge blade.
If the tear has a flap that fully or adequately
covers the wood, then color the outline of the area with a black sharpie. You may need a few coats. Glue the flap back into place using
contact cement. (dried excess rolls off with your finger.)
If the tear has no flap or the flap is unusable, see if you can find an adequate patch piece of tolex from inside the cabinet, else you'll have to find some Tolex elsewhere. (Cannibalize an old guitar case?)
Cut out a section of tolex that's larger than the damage. Visually align the tolex with the amps' covering, so you can 'match the grain'.
Trace the damaged area onto a piece of masking tape. Pressing the tape against the bounraries of the tear will hi-light the area for tracing.
Place the 'trace tape' onto the Tolex. Etch out the patch using an appropriate sharp. Verify the fit.
Color the edges of the damaged area (where wood meets tolex) with a black Sharpie. 2-3 coats.
Install the patch using a little contact cement.
(Dried excess 'rolls off' with your finger.)
If the tolex patch looks too shiny, lightly
'finger rub' it with 1200-1500 paper.
Good Luck.

i found that a mild bleach/hot water solution worked really good.
obviously take the grill out b4 doing this.

When I cleaned my last grillcloth, I removed the grillboard from the cabinet (and the speakers from the grillboard) and placed it face-down over a double sink. I then saturated the grill cloth from the rear (so all the dirt and gunk goes OUT instead of IN where it is still somewhat clean) with Formula 409 household cleaning spray. I was constantly changing the angle of the "drip" by rotating the grillboard so that it all got soaked.
I let it stand for 10-15 minutes, then used a spray hose on it (again, from the inside and rotating to get it all evenly rinsed). Then using a sponge and/or paper towels, I blotted up all the moisture (so as to minimize soaking the grillboard's wood to prevent cracking and warping).
If this only removes one layer, then do it again AFTER you let the grillboard dry off first! A common household fan can be used to accelerate the drying (do NOT use a hair dryer w/heat unless the grillcloth appears to be loose or it has a lot of "hairs" cause by abrasion).
The idea is the same, adopt the chemical and procedure that is comfortable to you.
One point to look out for. Some replacement grillboards (or grillboards on non-Musicman amps) are made out of particle board or MDF. Do NOT get these wet or they can turn into something resembling soggy oatmeal!