The Simple way to keep your Azure Subscription "clean". This Azure Function will Automatically delete all "expired" resources inside your Azure Subscription, and nothing else.
A Resource is "expired" when it has a tag expireOn older then the current date.
To deploy all the resources in your Azure subscription, just click on the Deploy to Azure button.
This will open the Azure Portal in a deployment form. You will need to give it a name and select the location where you would like to deploy it.
Once the deployment is completed, from the Azure Portal select the subcription. First from the left menu select All Services and type "Subscription" in the search bar. Click on Subscriptions to see the list of available subscriptions. Click on the subscription where you just deployed AzSubscriptionCleaner.
From the option at the left select Access control (IAM). Click Add and select Add role assignment. From the new panel on the left, Select Contributor as Role and enter the name of your resource (ex: azsubcleaner) in the Select textbox.
Select the Select blue button, and your are done!
Or Read the blog post Use Azure Function to Clean-up your Mess, Automatically