Reframe the problem before you change anything
A bird labelled a bath-hater has usually only refused the one method it was offered, in the one place it was offered, often after being sprayed without warning early in its life. Birds bathe by instinct to maintain feather condition, so the task is detective work, not persuasion: find the presentation of water that matches how this individual feels safe. That search can take weeks, and rushing it with a forced soaking confirms the bird's suspicion that water means being trapped. Every trial below is an offer the bird can decline.
Work through the alternatives, one variable at a time
Start with a shallow dish on the cage floor rather than clipped high, since many birds that ignore a hanging bath will investigate one at ground level. If that fails, line the dish with wet leafy greens; some birds roll on wet leaves when they will not enter open water. Next try sound: a dish placed near a gently running tap tempts many birds that ignore still water. Then try a fine mist sprayed into the air above an out-of-cage stand, letting the bird move toward or away from the fall zone. Offer each method at the same warm, calm time of day for several days before judging it.
Use social and routine cues
Birds bathe more readily when the household rhythm suggests it is safe: your own relaxed presence nearby, another bird bathing within sight, or the vacuum cleaner running, which oddly triggers bathing in many parrots, possibly because its rumble resembles distant rain and thunder. Bathing right after a training session, when the bird is already engaged and rewarded, can also lower suspicion. Whatever the cue, keep sessions short and let the bird end them. The first voluntary dip, however brief, is a breakthrough to reward by simply leaving the dish available longer next time.
When refusal is a symptom, not a preference
A bird that once bathed and has stopped entirely deserves more attention than a lifelong refuser. Check whether the bird is mid-moult and tender, whether a new cage position has made it feel exposed, and whether anything else has changed: appetite, droppings, energy, feather quality. A bird that stops bathing alongside fluffed posture, reduced vocalisation or weight loss should be examined by an avian veterinarian, because reluctance to bathe can ride along with illness. Do not try to solve that pattern with increasingly inventive bath toys. Offer the chosen method after the cage has been cleaned and the bird is back in familiar surroundings, not during the upheaval itself, because a bird already unsettled by cleaning day rarely experiments with water.
Keep a trial log so the search stays honest
It is easy to offer the same refused dish five times and forget the greens ever happened. Writing each method, the date tried and the bird's exact response into KinsLe's Care Teams builds a real record of the search, lets a second carer continue the sequence instead of restarting it, and shows you the slow approaches, a foot in the water, a dip of the chest, as the progress they genuinely are.