What more can I do to fight thrips? I isolated the affected plants, wiped all the leaves and stems down each week and gave them a proper rinse in the shower with a sponge every two weeks to make sure I was getting as much as possible following the app. However, after 8+ weeks the leaves are still forming brown spots including new growth, and I still find tiny thrips munching away on the top of leaves! Is there something I'm not doing?