guess you were making TA from pellets. back when i used to use pellets i didnt use a coffee filter. after the pellets dissolved (about 10 minutes with heat) i added oil, shake very well, put back on heat and it will seperate in about 15 minutes. the gunk fillers will be stuck to the bottom so you draw off gold filter one time with a .45 then heat sterilize. you good to go. the litttle bit of gold left at the bottom of the orinal vial can be saved for next time. you end up with little or no waste.
you also said " I have now learned if using a coffee filter during the process it can help to wet the filter with sterile oil, not the whole thing just a little before".
sterile oil is not needed for this. and also the fridge is nt needed if you bake it for an hour at 250f. aspirate the vial and let cool naturally before IM.