Drainage problems ? Overwatering? / flushing q

Hey , I recently switched from standard 3 gal grow bags to 10 gal grow bags that I fold down, making the bag 2' wide x 1' long. But the amount of soil is around 3 - 4 gal I changed bag sizes because bigger the roots.... Also I can top the he'll out of em turning them into bushes! But last night I caught the scent of like...mildew. I noticed the same smell in my molasses container... I think. So, my q is, what's causing that damn smell, I got a crop of killer Kush a month away & now I'm worried. When I noticed it last night , my first thought was to let them dry out a bit, but they are flowering & I know u shouldn't let it dry out while flowering,
Also I thought it might be drainage, these bags & plants are so big wide, I couldn't find proper drainage trays, so maybe I should lift them up a lil so the water isn't trapped? I might've not used enough perlite too, but doubt it.

Also I have a separate q about flushing. From what I've read and researched , they say to flush well after stop nutes. Well I read an article about Chemdog in HT & he & Subcool both say they flush every day for the last 2 weeks. Now I've heard something like this b4 from a grower I know but thought all that water would be too much, do they mean like, say, flush it, let drain & dry a lil , then flush again & again & so on, like flush every 3rd or 4th day for the last weeks. Thanks guys. That smell has me worried, it's my finest crop to date & I feel she is in trouble. Any help will be greatly appreciated.

 

I know that , lol. I have trouble being clear I think when stating my q's. my q about flushing was about the method Subcool & Chemdog mention in this article in HT. They both say they flush either "everday or regularly"for the last 2 weeks. ( can't remember exact quote but I can find it if it will help) So, do they mean flush it ( of course w just clean water ) every day for the last 2 weeks? Or flush it regularly for the last 2 weeks, meaning - flush it very third day or so the last 2 weeks. B/c if you literally flushed it w 3 gal of water per 1 , every day for 2 weeks , I would think that would be too much water , but I don't know. So my q is which does anyone think is the right way?

Thanks

 

Ok thanks man, so that's all they meant. Great , appreciate the help

As per my smell problem , I still could use help there too, I've been thinking, in the mean time I'm going to raise them a little & poke some holes in the Grwbag. Also I know it's not advised, but should I let them dry a bit?
I think it has to do w one of the new things I added the Blk Strap Mollasses & the shallow wide grow bags instead of the normal size I used before.
Any help would be great.