I feel that is a thorough of cleaning the the entire lateral line and drops. That will probably rid the lines of almost all of your bacteria but will unfortunately still leave behind the mold spores.

I sat down and did some math when I got home and it will cost me about 300 dollars to replace all the spouts brand new. If I choose not to replace them and lose even a slight margin of production, say 5%, based upon my production of 0.41 gal/tap I would be losing about $1,200 dollars.

Given all of this, and unfortunately how wasteful it seems to be, I believe the ultimate decision is just to replace the spouts every year but still trying to clean your laterals as goods as you can to prolong the life span of them.