Product for keeping glass clean

Poppycat

I no you can get prducts you put on car windscreens that stop dirt/water for adhering to windscreens can you get them for domestic glass?

Reason I am asking is that we recently had a patio doors fitting and I have to keep the glass clean on a 2-3 day cycle as it soon gets dirty. We dont have this problem on the erst of the house, but I noticed when I ordered the doors that you could pay extra to get some chemicals called io-clean that self clean the windows they wanted £126.67 for that as I thought it was just a rip off, and I said I clean them myself.

There must be something in that glass that easily attracts dirt because no other window/door that I have had shows dirt so much. I only cleaned it on Fridays and after yesterdays Rain falls its dirty again.

http://www.saint-gobain-glass.com/uk/a2.htm

Thanks

Poppycat

I see this product rain racer but they dont say how much it costs

http://www.rainracer.com/

Poppycat

Had a look around has anyone used these products

PermaClear ProClean Non Alkaline Glass Cleaner & StayClean for glass

http://cgi.ebay.co.uk/PermaClear-Glass-Protection-Pack_W0QQitemZ330024106963QQihZ014QQcategoryZ72201QQssPageNameZWDVWQQrdZ1QQcmdZViewItem