Corona, where does webView store temporary files? When will they get cleaned up?

Solar2D General Questions/Discussion
#1

I have an app using webView actively.

I am wondering where the webView stores temporary files, such as html or images files?

And when will these files get cleaned up (removed)?

I am asking because I have found the storage size of my app is growing even if I delete all files in Temporary, Cache and Document directories. 

Please help.

Thanks.

#2

Please forget about this question. 

I have found the true cause for the growing storage size. It’s the cache files generated by network.request() 

I am asking the solution by creating another thread:

http://forums.coronalabs.com/topic/51996-urgent-how-to-clear-the-files-in-fscacheddata-its-growing-without-limitation/

#3

Please forget about this question. 

I have found the true cause for the growing storage size. It’s the cache files generated by network.request() 

I am asking the solution by creating another thread:

http://forums.coronalabs.com/topic/51996-urgent-how-to-clear-the-files-in-fscacheddata-its-growing-without-limitation/