How much isopropanol is effective but safe for viny?

My solution is distilled water with about 10% isopropyl and a drop of dish detergent. This is used with a very inexpensive cleaning machine. I wipe with a microfiber cloth until nearly dry.

Stubborn records, the ones which still have a lots of pops and clicks, I use a lint removal brush, a drop of detergent on the record and scrub with the solution above which creates lots of sudsing.  Then rinse under hot tap water and dry.  Several unplayable records have been recovered to play as "very good" to "very good plus" after scrubbing.  I have several records purchased as "very scratched" for between $0.05 and $0.95 which play as "very good plus".... amazed me.

I don't remember what it was, but I think there was some question about using Photo-flo for cleaning LPs.  Anyway, something I read did cause me to stop using it about 10 or more years ago, in favor of Tween20 or Triton X100, or even Dawn.

The entire 100% of 100%. Alcohol poses no harm to vinyl. 

@invictus005 - OK, it may do no harm, but how is it effective as a cleaner?  It's not nearly the solvent as distilled water.  

Distilled water is a terrible solvent for what’s on a tipical vinyl. Alcohol is great OTOH.