Days 18 - 20: As we have no established higher camp, we carry the tent and camp equipment up to camp 3. This is extremely taxing. We have to break all new trail with very sticky skins and a heavy pack. We set up camp at about 22,500ft but our stove is only getting wors at the higher altitude and we manage to only melt one liter of water before we tug in. We decide to delay our summit push by a day to work on the stove, hydrate more, but both tasks are not very successful. When we finally start our summit attempt on the next day we struggle with the cold and nausea and only ascend a few switchbacks in the dark and windy early morning. We descend back to camp and crawl back in our sleeping bags. All drive is gone and we know this was our last attempt. We pack up, and ski from camp to camp with an increasingly heavy pack while we collect all our gear and bring all down to basecamp in one push.