BUBBLES IN DRYWALL MUD!!! 

They are ENDLESSLY FRUSTRATING!!! Here is the only solution I have found for them.
Tools I use often:
DISCLAIMER: As an Amazon Associate I make a small commission from purchases through these links. Thank you for the support!!!!
Drywall knives:
2" amzn.to/2LwX8ty
4" amzn.to/32OHlw3
6" amzn.to/2LwP1x5
10" amzn.to/2QbLbOp (This one will rust if you leave it wet but feels nice to use)
10" amzn.to/3056fcU (This one is stainless. Stiffer, more expensive but won't rust)
Mud Pan with Grip!! (This is the BOMB! You will thank me!)
amzn.to/31tQauH
Tin Snips GOOD QUALITY!! amzn.to/2LzlOBv
Drywall Tape Holder!! amzn.to/32Udhzd
Paint Mixer for mud!! amzn.to/303fX0q
Full size mixer!! amzn.to/2LYrMLe
Mixing Drill (just in case)!! amzn.to/2O2oQ2P
Hawk and Trowels
13 inch hawk:
amzn.to/2ZWZXw2
13 inch trowels:
amzn.to/30aJPTB
amzn.to/2ZWH39d
amzn.to/2ZSY5Fj
12 inch trowels:
amzn.to/2Q5fGW4
amzn.to/2ZYKXxu
14 inch trowels:
amzn.to/34JeydR
amzn.to/34CdmsJ
Auto tools
If you don't want to think, here is the whole kit (Columbia is great quality too!) amzn.to/2UwPUae
Mud tubes and applicator:
amzn.to/2Xt65XR (different but works great, I have this one too)
amzn.to/2DBs1sz
amzn.to/2Vdy8x7
Flushers
amzn.to/2Dqa0x8
amzn.to/2GyDBGy
amzn.to/2Ix1Reo
Handle adjustable
amzn.to/2XuGP3x
amzn.to/2Xy5ILU
or fixed handle amzn.to/2DrNt2O
Corner roller (head only, you may need another handle)
amzn.to/2XpuJZo (cheaper)
amzn.to/2XpuNZ8 (better quality)