How much do you tip tuk drivers and day guides without making it weird — round up, percent, or nothing?

For ordinary tuk hops, many visitors simply round up a little when the ride was fair, or leave nothing extra on a clear app fare already accepted by both sides. For a hired day driver or walking guide, a separate thank-you at the end is common when service was good — agree the day rate first so the tip is gratitude, not a repair for underpayment. There is no single sacred percentage. Avoid making the tip a long bargaining scene; hand it briefly with thanks. Temple tip-box pressure is a different problem — you already said you are not doing that. I will not invent mandatory amounts.