I am a chemical engineer and have recently joined a pharmaceutical company.Although I know the concepts of cleaning validation, i would appreciate if you can provide me with some good resources ( readings/links) to start with.
You may want to sign up for a PDA training class on cleaning validation. Just go to their website.
Also you may check the FDA guideline on cleaning validation:
I haven't worked in the pharm. industry so I'm not familiar with what you might be trying to validate but we had similar cleaning validation question when I was in the semiconductor industry. You might try contacting people or websites in that industry to see if some of their techniques can be used to fertilize some new ideas for your industry.