Bob Marley said it best..."Everything is gonna be alright..."
Check it out homes. Lets theorectically believe you might be in socal. Let me tell you something - its big time mold season around there dude. Be here is what you have to do.
The mold - you must remove all moldy leaves(If there are a shitload - you at the very least have to trim the moldy parts off - the rest of the leaf will proabably end up molding later but at least you have something to use photosynthesis for the next couple days) The spray works best as a preventive medicine - serenade is good but its preventive and only lasts a week. Forms little white crusties on the leaves when its baked on under the lights - so you can see that it dries out quickly - especially in a grow room with high temps and less than sufficient circulation.
Step 2 - Spray serenade. - Get a small dehumidifier if you can.
Step 3 - You gotta get the fan in there ASAP
Step 4 - Tie that big top bud down. I think what crispy is talking about is...
1. tie a knot around a good spot below the top of the bud - maybe like 6 or 7 inches down from the top. 2. take a nail - drive it into the rim of your pot 3. Take the other end of the string and ::gently:: pull that bud down - then tie the end of the string to the nail. Looks like you "lassowed the top and pulled it over." That is kinda like LST - but LST is more about bending and pruning during veg. You will make it to seven weeks dude! I will post some pics soon with the same strain growing in hydro. The fan will help more than you can imagine. Socal has wierd mold issues this time of year.