I was happy when I saw my monstera growing a new leaf, but recently I noticed a white/brown patch on it and I'm getting worried. What does the patch signify? How can I help the plant?
Monstera Deliciosa are an interesting plant in the wild. They start out as terrestrial plants, but become epiphytic with time. Their seeds fall down to the ground, where the take root. The plant will crawl across the ground to the first tree. At that point it will 'climb' up the side of the tree. They can grow as tall as the tree 50', so they use specialty roots on the side of the tree to cling itself to the tree, also to capture water from the air and water that runs down the side of the tree.
This means in a pot, they need very well draining soil. The need to be moist at all times, but the soil needs to be very well drained. Use indoor potting soil that you add additional drainage matter like perlite. About 30% of the new mix should be the additional drainage material. They like rich soil, so adding some compost to the mix will be a nice treat.
Do not water on a schedule. Water when the top 3-5 cm (1-2") is dry. Never let the entire pot go dry. This plant wants constant moisture, but not wet. Water until water comes out the bottom holes. Then dump out the excess water out of the catch basin.
I don't know how dark that corner is, but they like bright shade or bright indirect light.