I used 2% milk 1/10 ratio with water (in the last three days of flower with PM...), and then the last two rinses I used PH down (strong mix), and finally RO water. Took off a lot of resin, but no after taste, and no spores, ever, any. To each there own though. Good luck!
JMS Stylet oil (OMRI listed emulsified paraffinic oil) also works well for me, but some strains are really sensitive, and hard to dose right (or it just reacts like a burn when it meets the fungus on the foliage (maybe a lil light burn, can't fully tell yet...?). I am currently treating a fungus problem (not PM,but i'm thinking septoria, maybe DM and/or rust?) and running side by side studies with multiple plants of a couple strains in veg, and I just sprayed stylet 4 weeks in on my 707H.B. and my G-13. I left my P.K. and M.T.F alone to see how they would finish, and if it is going to get at my un-sprayed buds in the final weeks? I'll let you know. But if you want to try something now, I have been feeding my vegging girls stylet via soil-drench (even though it isn't directed this way), and so far it seems to be working a lot better than the ones I am just dunking/spraying.