spraying glue to scenarios issues

[Dog1]

hi , i bought a glue spray can to fix the various soft materials placed on a scenario such as grass , earth etc and applied the spray .  the result was a disaster . the glue came out in bubbles and went all over my hand and down the can as well as spraying and droping blotches onto the scenario and even the floor !!!! what other civilized manner is there for fixing soft materials such as sand and  synthetic materials for diorama ?   

[chukw]

I've always used regular white glue thinned with water, painted on the base with an old, wide brush.  

[Scott Smith]

I’ve used Mod podge on one I built. White glue would have been fine.