[exim] (re)solve retrydb issues

Good day Guys

Where I work, we keep getting the following message "retry time not
reached for any host".

To resolve, we run the following:

cd /var/spool/exim/db
rm -f retry retry.lockfile
rm -f wait-remote_smtp wait-remote_smtp.lockfile
service exim restart

Can anyone please share any preventative tips and / tricks. Or better a
means of auto healing.
I dont want to have to write a bash / cron to manage this. It would be
ideal to get exim to (re)solve the issue.
Googling isn't proving to be helpful in this instance.

Your help / feedback would be appreciated.

Regards
Brent Clark