I had this last week and was so grateful for all the tips on MN.
I'm not sure that apple juice will be strong enough to get rid of the taste of the prep solution as it is very salty and disgusting.
I bought this and so pleased I did as I could have it as strong as I wanted and it tasted really nice (unlike squash which tastes awful when it is too strong):
https://www.tesco.com/groceries/en-GB/products/264510637
Belvoir Elderflower Cordial 500Ml
I took one sip of the prep using a straw and immediately took a sip of the cordial, again using a straw. I really looked forward to the cordial as it was so nice, that I quickly forgot about the prep solution and it felt like a reward to look forward to after the sip of prep.
I also put lots of vaseline just after I had taken the prep and had no issues.
I also wore Tena pants which were very handy in bed and when travelling to my appointment which was in the pm and so I took the second dose first thing in the morning.
The instructions said that I should stop going to the loo around 2 hours after my second dose, but I was still going 6 hours later! I am not sure why.
The actual procedure was fine, I had sedation, but did not feel sedated at all and my stomach just felt a bit full up with air, no pain at all.