I would develop the habit of fastidious cleaning as a part of your daily cpap routine. After a while you just simply do it and it takes just a few seconds. Using spotless equipment is the best you can do, so why not clean every day. It's the first thing I do when I get out of bed, hang up the hose, rinse off and dry the mask skeleton, wash all silicon bits in baby shampoo and pat everything dry with kitchen paper towel. I clean out the humidifier tank once a week bit keep it covered from daylight to stop algae developing. I also wipe all contact areas of my face( particularly the bridge of my nose) with TCP antiseptic before and just after wearing the mask. This ( I think ) has cleared up my sore nose and spots which were becoming intolerable.
If you think about it, Our mouths are jam packed with all sorts of crud and bacteria and our noses are the bodies mechanism for cleaning the air we take in. They both have mechanisms to kill or deal with that bacteria, Your mask and it's silicon seal do not! Add to that, a nice warm humidified atmosphere and bingo you have a germ health spa going on.
Keeping it all clean IS the best you can do for yourself.
If the cold air blowing strait at your nose is a problem, fill the humidifier with hot water instead of cold and give it a head start.
I do find that I get leaks from my Quattro blowing on my eyes even though apart from that I have a perfect seal. I think I will try an eye mask of some sort now I am this far with the learning curve. Thats what stopping the leaks is all about I think, Its a very personal and individual learning thing. I did find that keeping it looser was better and allows the cushion of air to do its job and form the seal but at first I just kept doing the straps up tighter

and looking like a star trek extra the next day.
I think the quattro is a good mask Sasha, it's starting to get better for me anyway.