If you're wanting to speak to the same participant/s you've spoken to before OR would like to reuse the applicants you've had before, this video explains the steps required to arrange this
Steps to follow
1. Draft up a new Study that you would like past participants to apply to
2. Feel free to remove screener questions & set to Automated selection
3. Select the recruit from Askable Panel option
4. Submit your Study
5. Contact Support via the Live Chat informing us of your intended purpose for the Study
6. We'll send you a link to share with your past participants