Clean your stove vents

Use specific cleaning products for stove windows
We recommend cleaning your windows with a fireplace insert, stove glass cleaner, and a cleaning sponge that has been tested and approved specifically for cleaning fireplace insert windows.  Glass, insert, and heater maintenance products clean quickly, are scratch-resistant, require no water, and aren't messy.

bicarbonate of soda
For those who don't like using chemicals, you can try using a paste of baking soda and water to clean the stove glass.
If you really want to get the job done, there are special stovetop glass cleaning sprays that provide the ultimate in convenience.

Polish your wood-burning stove glass to the finish
Once the inside of the stove glass is clean, it is a good idea to finish it with a bit of varnish. Using a simple solution of equal parts vinegar and water using a paper towel is a good way to polish inner glass without leaving chemicals inside.

You can do the same for exterior glass, or just use a fine mist of a glass product or window cleaner. Again, be careful not to damage the wood-burning stove with chemicals. Polish the glass with a soft, dry cloth and the wood stove glass should now be clean.

Wood stove glass cleaning tips
Remember that glass can scratch, so do not use any abrasive material on the glass that may damage it irreparably
Don't let too much time pass between the next cleaning of the wood-burning stove glass. Keep in mind that the more soot builds up over time, the more difficult it is to remove.

If you notice damage to the seal around the door or cracks in the glass, be sure to replace the glass on the wood stove.
Remember that if the wood stove glass is very dirty, so will the chimneys. Be sure to clean the chimney regularly to avoid accidental chimney fires.

What precautions should be taken to keep the interior glass clean?
As mentioned above, the best way to keep your wood stove glass clean is to make sure you're burning seasoned wood. This way you can ensure that your fire produces as little smoke as possible, which means that the glass is also more likely to stay clean longer.

Most modern wood-burning stoves have an air washer system, which is another way to prevent wood stove glass from getting dirty quickly. Next-generation wood stoves use vents around the stove glass to draw airflow that draws smoke and fuel away from the interior glass.

 Even when your fire is burning, the hatch should still be slightly open, so make sure you are using your fire properly.
Again, making sure your clean fuel burns at the highest effective temperature is also one of the best things you can do to keep your stove glass clean for longer.

There is nothing more frustrating than turning on the stove, closing the door and not being able to see the fire through the glass. Remember that wood-burning stove glass gets dirty in two ways: by burning wet wood or by burning wood with a large amount of resin. Over time, if it is not cleaned, you will not be able to see the beautiful flames glowing; Which is, after all, a big part of the reason you buy a stove. So in order to avoid the frightening accumulation of soot and tar, you need to clean the glass regularly.