There is a duty of care we request you adhere to once you have receive your furniture. It is outdoor furniture and there to be enjoyed but just like anything, it must be regularly cleaned (machine washing cushion covers) and spillages removed immediately by washing. WE DO NOT RECOMMEND POWER WASHING YOUR FURNITURE. If your furniture is prone to damp and lack of sunlight, you should ensure the cushions are regularly aired to prevent mildew. If you are using protective covers, make sure you regularly air your furniture to prevent moisture build-up. If you do not wish your teak to silver, please invest in Cutek (we sell in the showroom) or our Cutek Service (simply call us for more details). We provide details on your invoice about maintenance and care but, if unsure, always reach out to us and ask; we are here to help and more than happy to answer any queries you may have.