I've been developing my own film for going on nearly 30 years now. In all that time, I've used one wetting agent more than any other (and still do today). No, not the default Kodak PhotoFlo... For one, you have to mix up a working solution ahead of time and secondly, it has been known to leave deposits on tanks and (especially) reels. Bah!
Next time you're stocking up on supplies, check out
LFN Wetting Agent which is made by Edwal.
Freestyle Photo carries it, as do many others. It comes in
small bottles (which last forever). Why?
The beauty of LFN is that you only need a single
drop in your final rinse! Open up your tank if you haven't done so already at this point, dispense a drop and fill with cold water. Give it a very casual slosh (so as not to create bubbles) for 30 seconds and you're done! Nothing to mix up, nothing to store - and no deposits.
Good stuff, this: