Suggestion, but check with your doctor - add a small amount of vinegar, 1 tsp per 8 oz maybe, to the water in the bottle. A mild vinegar solution has been used forever for wound healing. It re-balances the Ph level on skin after urinating. Many articles about the use of diluted vinegar (never straight vinegar!) it may also keep bacteria from growing in your squeeze bottle in warm weather.
Here’s one article:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5868106/

When I had babies (circa 1981 before baby wipes were everywhere) our pediatrician told me to use the vinegar/water solution on the baby’s bottom when changing diapers. It helped prevent diaper rash and was mild enough for the baby’s skin (no rinsing needed).

Fun fact on skin Ph balance: do you know why lidocaine stings so bad when it is used to numb your skin? Yep, Ph balance is off, and it stings until it is neutralized which luckily is quick. I tried to get the radiologist to adjust the Ph balance of the lidocaine used in my breast biopsy. Unfortunately, she said, the chemical used to adjust the Ph balance can cause the injection site (needle path) to not coagulate to heal, and can cause tissue damage.