<span class="link_user">@Bigteebuds</span>, buy a humidifier. fills with water and then evapourates it into vapour which will bring the RH up. The trick is not to buy a cheap one. It sucks but if you plan to do this growing thing again it it is worth the investment. You could buy a little one on amazon for £20 but it wont work. Trust me. I did exactlly that after a grower on here gave me the same advice. I ignored him and ended up having to buy an expensive/better one anyway.(thanks <span class="link_user">@The8thChevron</span>:laughing:)