remove the Webview

Got the following:

<View id="viewMap" >
    <WebView url="OpenLayers/map/page/map.html" id="mapPlantation"></WebView>
</View>

But, I must destroy it as soon as complete an action, call the $.viewMap.remove($.mapPlantation); and Safari and stateful memory webView realize that was not removed and is stored in memory, which with time becomes a big problem.

I'm doing it a certain way? is possible to force a memory cleaning?

How can I solve this problem?

ps: Sorry for bad english, I'm Brazilian and my forte is the good old Portuguese