We use these to keep non cloth safe diaper creams off of our cloth when needed and have had no issues at all. (cozybums.ca)
The following chart (some of which I've published before) indicates that schools cream off a select group of students — students who end up doing statistically better on standardized test scores. (jonathanpelto.com)
Choice programs cream off the best students, leaving the poor and marginalized behind. (religion-online.org)