Equipment: glass, water regular, test paper for PH.
Time. Around 40 min.
Keep glass in one hand for 15 min. Than measure PH results according instruction.
Change hands and water. The same procedure repeat.
My right hand shows 7.0-7.2
My left hand shows 6.5-6.2.
The same experiment, but glass with water on the table. Hand near the glass, about 20-30 cm.