This is only a partial answer. You can use Cron View to see what crons are still active on your blog.
If you find some crons that shouldn’t be there then maybe my answer here will help you remove that cron: Cron jobs for deactivated plugins
This is only a partial answer. You can use Cron View to see what crons are still active on your blog.
If you find some crons that shouldn’t be there then maybe my answer here will help you remove that cron: Cron jobs for deactivated plugins