how to get in the habit of showering everyday Watch
If you're showering twice a day then you shouldn't need 35 minutes to shower. Have a good scrub in the morning and a quick wash over in the evening. Make it part of a routine and you'll be more likely to stick to it.
I don't think you need 2 showers a day, that's not good for your skin. You should keep it to 1 shower a day and alternate between what you do. Like 2 days a week I will do a body scrub because I have really dry skin, another day I will shave my legs, 3 days a week I will Ash my hair. It saves shower time and I don't need to wash my hair everyday.
If you're finding you would need more than 1 shower a day then perhaps you need to see a pharmacist or GP about why you smell, in case it's a medical reason. You shouldn't need to shower more than once a day. If it's because of exercise or something then shower after, not before and then after if you can help it
About 10/ 15, minutes is ample.