Can I mix Sal Suds Biodegradable Cleaner with vinegar?Updated a year ago

We do not recommend mixing vinegar with Sal Suds Biodegradable Cleaner*. We recently did effectiveness testing after mixing the two, and we found that Sal Suds mixed with vinegar is less effective at cleaning than Sal Suds alone. 

*Sal Suds cleaner shows >60% biodegradation after 28 days per ISO 14593.