We have a number of partial responses. Is there a way to contact these people to remind them to come back and complete their responses.
This really depends on how you sent your survey to your respondents in the first place.
If you used a SurveyGizmo email campaign, you have the option to create reminder email messages which automatically go only to the respondents who are Partial or have not started.
Here is more info on that:
Hope this helps