I use the mesh zip bag to stop the hash containing too much green material or the green material clogging the bags. I personally will always use the zip bag to put my weed in but that would be for you to experiment with.
Using the washing machine means you could run it multiple times so it is washed for multiple 20 minute periods. Also I collect the run off water and reuse it so there is very little water wastage.
For the £20 the machine cost me I would recommend it. There are similar machines with bubbleator printed on them that do exactly the same but are marketed to gullible weed smokers but they cost over £100.
I recently done another run with this and you can see it in my grow log here Whats in my box? - #45 by jesuswearsflares
Hope that is of help to you. I probably wouldnt recommend the TEMU bubble bags as I think they have some of the micron screens mislabelled
2 Likes