Forget about silicon wipers.
The key to having a long lasting wiper is first, getting a well known and branded one, and so far i've tried so many wipers, none last as long as Bosch. Yes, i've tried cheap ones from Brothers for RM3.90 per pair and i've also bough RM 40 per pair wipers claimed to be made in Japan but none last as long as Bosch. You must remember good wipers are not the ones made in Japan or UK or US but the ones that are have tropicalised rubber. Weather in Japan is definitely not the same as Malaysia so i doubt they make good wipers when used in Malaysia. The RM3.90 ones is definitely something i wish to forget. I threw it away after 2 months.
Secondly, taking good care of the wipers is very important. Forget about making the wiper stand up when parked under hot sun. I really don't see any reason to make it stand because its still under the sun whether you lay it on the windscreen or make it stand. When i say take care, everytime you wash your car you must also clean the rubber nicely. You'll be surprised how freaking dirty is it the next time you wash the wiper rubber. Because there's too much dirt on the rubber, when it rains, you won't get a nice clean wipe every cycle and it'll leave a trail of water as compared to a new or nicely maintained wiper.
I've used my Bosch almost a year now and even my friends say my wipers are working in almost brand new condition and its simply because i clean it everytime i wash my car. My mum's "made in japan" wiper that i bought at the same time as my bosch is making tonnes of squeeking noice and have some cracks thus not giving a nice clean wipe. Its even more expensive that the Bosch ones i have.
However, my personal opinion on windscreen care. Rain-X sucks big time. Fine, its good during raining but when used for a long period of time, it'll leave those ugly fugly dried water spots on the windscreen. It took me so much effort and cleaning to remove those shitty watermark spots. I actually used a detergent to scrub it off and that is also after 5 washings that the marks wore off. Becareful on your paint though.
PS: My car is also parked under the hot sun almost every day.