Kev tu cov hniav bursFirst, deg tshuaj tua kab mob cov koob siv los ntawm soaking lawv rau 30 feeb. Cov tshuaj tua kab mob yog 2% glutaraldehyde. Tom qab soaking, siv ib tug me me- taub hau txhuam hniav los ntxuav cov textured ib feem ntawm lub burr, thiab ces yaug nrog dej huv.