> Oral sodium sulfate in a single dose has been found to cause increased gastrointestinal (GI) events

> Sodium phosphate is no longer recommended as a bowel preparation regimen due to its serious side effects

Essentially, put in the effort and do the liquid bowel prep.

Consider adding flavour drops to your drink, icing it or turn it into a slushie to make it slightly more interesting to drink. The PEG will make the ice crystals slightly more smoother.

https://www.ncbi.nlm.nih.gov/books/NBK535368/

> Sodium phosphate is no longer recommended as a bowel preparation regimen due to its serious side effects

Well in my country, it's still wildly used for people without renal issues.