Swimming pool decks have been surface-coated to hold-off water and repel oil-based stains. Overtime these coatings wear thin and become ineffective requiring maintenance as well as occasional deep cleaning.

Your external deck is subject to foot traffic that builds up greasy dirt. Too often, there is an attempt to clean with either water or off-the-shelf supermarket cleaners. Neither of these methods are appropriate and ends up requiring a proper maintenance clean.