Did you cover the wheel with a soapy solution ? Especially where the rim and the tyre meet. if you notice bubbles forming then shake the wheel around so the sealant gets to the unsealed spots.
Getting them seated is only part of the setup. If there are gaps around the rim/tyre interface you have to shake the wheel to get sealant to the right place.
Don't use a bath, the air loss is too slow to notice. Soapy water will show up patches of bubbles as the air slowly seeps out.
Did you cover the wheel with a soapy solution ? Especially where the rim and the tyre meet. if you notice bubbles forming then shake the wheel around so the sealant gets to the unsealed spots.