I whipped up abatch of hard cider 7 days ago. With safale US-05 dry yeast the OG was 1.065. Well the past 2 days its been smelling like rotten eggs in my closet. I read on the forums this is hydrogen sulfide and is normal and that i should add some yeast nutrient. Well today i did just that added some yeast nutrient and took a hydro reading in the process it was 1.020. I Manned up and took a gulp of the sample it did not taste as bad as it smelt. Well i was reading about hydrogen sulfide on the internet and it says this stuff is a deadly gas. Is it safe to breath this stuff i took some big whiffs taking off the fermenter top. And more IMPORTANTLY will i be ok after taking a gulp of the sample is it safe to drink this stuff? I'm a bit worried now.