PyQt Ram Usage

[Country Boy]

Hi,
I am new to Python (and programming so pardon my ignorance)
I have a small PyQt program that lives in windows system tray. I am
using Suds & ElemetTree to do webservices call and parse XML.
I have a QTimer that runs every 30 seconds and fetches the updated
data from the server.
Finally, the python script is "frozen" into exe using CX_FREEZE.
When I run the exe, it starts with 18MB (which i think i high for an
app that just fetches info from webserver and creates a menu full of
web url shortcuts, but thats besides the point).
After every 30 seconds (as my QTimer timeout()), my RAM usage goes up
by 400KB. So after an hour or two of running the application almost
uses ~60MB or more, which is ridiculous.
I think my application has some memory leaks and I think every time I
create an instance of the WebService class (its a QThread that fetches
information using WSDL) the RAM goes up but doesn't get released once
Class's work is done. Can somebody pls direct me into the things that
I should be looking into to troubleshooting this issue...


I am running my application on Windows Embedded thin clients so its
really important that my application's memory footprint is low.

Update: I tried del <objectname> and it decreased the amount of RAM
overall, but the application still starts with 20MB and then goes unto
40MB.