The reason why your pieces are sticky has several reasons:
- Mixing too much glitters
- Mixing too much pigment dye
- Using incompatible pigment dye/powder
- Solid colors need more layers and more time under the light
- Curing time too short
- Using a low watt light source
You will need to use UV resin in thin layers and cure them in layers not more than 5mm.
And you will need to have a stronger UV lamp at least 36 watts or cure them for at least 5-10 mins under a weaker light source.
The way to remove the sticky pieces, put them under the sunlight for a day or two.