When cleaning your walnut veneer surface, don't use sponges as this can just spread the liquid. Instead, use a damp paper towel or clean dishcloth and wipe in the direction of the wood grain. For more stubborn marks, apply a dab of mild dishwashing detergent to your cloth and again wipe in the direction of the wood grain. 

If you are ever unsure about the cleaning product you are using, it's always best to test a small area of the veneer that is out of sight, before going ahead and cleaning the whole thing. To clean the tempered glass, spray a non-abrasive glass cleaner onto a lint free cloth and gently rub the glass clean in a circular motion. Afterwards, with a dry microfibre cloth, buff the surface until it's dry. You can also use soapy lukewarm water and dish soap to give the table a good clean, but make sure you wipe away the soapy residue off the glass after cleaning to avoid leaving water marks. 

This item will be delivered unassembled. Assembly is very easy using the fittings and instructions provided.