Help / Screen is doing some weird thing

[dirkdiggler]

haven't degreased in years, for me, waste of time.

[kingscreen]

To me, it looks like moisture or chemical residue.  It could also be washout booth blow-back. 
I would give your washout booth a good cleaning and add a hose for final rinsing (if you're only using a pressure washer) to prevent blow-back.
And add a dehumidifier to your screen room if it doesn't already have one, to ensure that the screens are truly bone dry before coating.
I'm with Dirk.  I haven't degreased in ages.  However, if it's only specific screens and not others, you may want to give them a thorough degreasing.

[3Deep]

haven't degreased in years, for me, waste of time.

same here with degreasing, well I take that back I do degrease brand new screens.

[alan802]

I've seen this (not to that extreme but definitely the same thing happening) a couple hundred times just this year.  My guy doesn't rinse the screens good enough and there is chemical residual water dripping down from the short rollers since that is what ends up sitting down in the dirty dip tank and then when it doesn't get rinsed thoroughly it drips down in the screen.  When I rinse the screens this doesn't happen at all, but you can show someone how to do it properly but if they don't want to do it, you just got to fire them.

[Frog]

When rinsing chemicals (like degreaser) we want water at high volume, but low pressure, like a regular hose and a broad nozzle (if any nozzle at all)

The exceptoion I make for this is when I use something like Liquid Renuit, which removes stains, haze, and degreases as well. For that, I like a spray with a little oomph, careful to not get blow-back.